Dichloro-2,4,6-triphenyl

Describe and illustrate atom transfer polymerizations controlled by copper/bipyridine complex and by carbon tetrachloride, dichloro(triphenyl-phosphine)-mthenium(ll), and methylaluminum bis(2,6-di-ferf-butyl-phenoxide). Explain what ARGENT)ATRP and SET-LRP) mean. Illustrate the proposed Percec mechanism and the Matyjaszewski mechanisms. 

Notable examples of general synthetic procedures in Volume 47 include the synthesis of aromatic aldehydes (from dichloro-methyl methyl ether), aliphatic aldehydes (from alkyl halides and trimethylamine oxide and by oxidation of alcohols using dimethyl sulfoxide, dicyclohexylcarbodiimide, and pyridinum trifluoro-acetate the latter method is particularly useful since the conditions are so mild), carbethoxycycloalkanones (from sodium hydride, diethyl carbonate, and the cycloalkanone), m-dialkylbenzenes (from the />-isomer by isomerization with hydrogen fluoride and boron trifluoride), and the deamination of amines (by conversion to the nitrosoamide and thermolysis to the ester). Other general methods are represented by the synthesis of 1 J-difluoroolefins (from sodium chlorodifluoroacetate, triphenyl phosphine, and an aldehyde or ketone), the nitration of aromatic rings (with ni-tronium tetrafluoroborate), the reductive methylation of aromatic nitro compounds (with formaldehyde and hydrogen), the synthesis of dialkyl ketones (from carboxylic acids and iron powder), and the preparation of 1-substituted cyclopropanols (from the condensation of a 1,3-dichloro-2-propanol derivative and ethyl-... 

R)- and (,S )-1.1,2-Triphenyl-l,2-ethancdiol which are reliable and useful chiral auxiliary groups (see Section 1.3.4.2.2.3.) also perform ami-sclcctive aldol additions with remarkable induced stereoselectivity72. The (/7)-diastercomer, readily available from (7 )-methyl mandelate (2-hy-droxy-2-phcnylaeetate) and phenylmagnesium bromide in a 71 % yield, is esterified to give the chiral propanoate which is converted into the O-silyl protected ester by deprotonation, silylation, and subsequent hydrolysis. When the protected ester is deprotonated with lithium cyclohexyliso-propylamide, transmetalated by the addition of dichloro(dicyclopentadienyl)zirconium, and finally reacted with aldehydes, predominantly twm -diastereomers 15 result. For different aldehydes, the ratio of 15 to the total amount of the syn-diastereomers is between 88 12 and 98 2 while the chemical yields are 71 -90%. Furthermore, high induced stereoselectivity is obtained the diastereomeric ratios of ami-15/anti-16 arc between 95 5 and >98 2. 

Bis-[triphenylphosphin]-carbonyl-organo-rhodium(0) bzw. -iridium(O) sind aus den entsprechenden Dichloro-Komplexen bzw. Carbonyl-tris-[triphenyl-phosphin]-rhodium(0) bzw.-iridium(O) aus den Chloro-Komplexen zuganglich7 ... 

Floch, H. and R. Deschiens. 1962. Etude comparee de Taction molluscicide du 5,2 -dichloro-4 -nitro-salicy-lanilide (Bayer 73) et de sels (acetate et chlorine) de triphenyl-etain. Bull. Soc. Pathol. Exot. 55 816-825. 

Benzene, 1,3-dichloro-2-nitro, 49, 47 Benzene, 2-nitro-1,3,5-triphenyl, 49, 114... 

EINECS 203-468-6, see Ethylenediamine EINECS 203-470-7, see Allyl alcohol EINECS 203-472-8, see Chloroacetaldehyde EINECS 203-481-7, see Methyl formate EINECS 203-523-4, see 2-Methylpentane EINECS 203-528-1, see 2-Pentanone EINECS 203-544-9, see 1-Nitropropane EINECS 203-545-4, see Vinyl acetate EINECS 203-548-0, see 2,4-Dimethylpentane EINECS 203-550-1, see 4-Methyl-2-pentanone EINECS 203-558-5, see Diisopropylamine EINECS 203-560-6, see Isopropyl ether EINECS 203-561-1, see Isopropyl acetate EINECS 203-564-8, see Acetic anhydride EINECS 203-571-6, see Maleic anhydride EINECS 203-576-3, see m-Xylene EINECS 203-598-3, see Bis(2-chloroisopropyl) ether EINECS 203-604-4, see 1,3,5-Trimethylbenzene EINECS 203-608-6, see 1,3,5-Trichlorobenzene EINECS 203-620-1, see Diisobutyl ketone EINECS 203-621-7, see sec-Hexyl acetate EINECS 203-623-8, see Bromobenzene EINECS 203-624-3, see Methylcyclohexane EINECS 203-625-9, see Toluene EINECS 203-628-5, see Chlorobenzene EINECS 203-630-6, see Cyclohexanol EINECS 203-632-7, see Phenol EINECS 203-686-1, see Propyl acetate EINECS 203-692-4, see Pentane EINECS 203-694-5, see 1-Pentene EINECS 203-695-0, see cis-2-Pentene EINECS 203-699-2, see Butylamine EINECS 203-713-7, see Methyl cellosolve EINECS 203-714-2, see Methylal EINECS 203-716-3, see Diethylamine EINECS 203-721-0, see Ethyl formate EINECS 203-726-8, see Tetrahydrofuran EINECS 203-729-4, see Thiophene EINECS 203-767-1, see 2-Heptanone EINECS 203-772-9, see Methyl cellosolve acetate EINECS 203-777-6, see Hexane EINECS 203-799-6, see 2-Chloroethyl vinyl ether EINECS 203-804-1, see 2-Ethoxyethanol EINECS 203-806-2, see Cyclohexane EINECS 203-807-8, see Cyclohexene EINECS 203-809-9, see Pyridine EINECS 203-815-1, see Morpholine EINECS 203-839-2, see 2-Ethoxyethyl acetate EINECS 203-870-1, see Bis(2-chloroethyl) ether EINECS 203-892-1, see Octane EINECS 203-893-7, see 1-Octene EINECS 203-905-0, see 2-Butoxyethanol EINECS 203-913-4, see Nonane EINECS 203-920-2, see Bis(2-chloroethoxy)methane EINECS 203-967-9, see Dodecane EINECS 204-066-3, see 2-Methylpropene EINECS 204-112-2, see Triphenyl phosphate EINECS 204-211-0, see Bis(2-ethylhexyl) phthalate EINECS 204-258-7, see l,3-Dichloro-5,5-dimethylhydantoin... 

C27H23Cl2N03PRe, Rhenium(V), dichloro(2-(2 -hydroxyphenyl)-2-oxazoline)(triphenyl-phosphine) 0x0-, 34 58 C27H50P2, dcpp, l,3-bis(dicyclohexylphosphi-no)propane, complex with copper(I), 34 177... 

In view of the smooth addition of carbanions to the electrophilic P atom of phosphorins (see p. 78 and 66), Markl and Merz attempted the addition of carbenoids (carbenes ) by reacting dichloromethane, trichloromethane or dichloro-phenylmethane with potassium-tert-butoxide in the presence of 2.4.6-triphenyl-X -phosphorin 22 or 2.4.6-tri-tert-butyl-X -phosphorin 24. The desired bicyclocompound 7/5 or the X -phosphepin 116 were not obtained. Instead, benzene derivatives were formed by loss of a PCI fragment, the fate of which was not determined. Markl has proposed a mechanism in which intermediates 114,115 and 116 ZK invoked ... 

B. DICHLORO(THIOCARBONYL)TRIS(TRIPHENYL-PHOSPHINE)OSMIUM(II)... 

Dichloro(thiocarbonyl)tris(triphenylphosphine)osmium(II) (2.0 g), triphenyl-phosphine (0.1 g) and sodium hydroxide (0.5 g) are combined with 2-methoxy-ethanol (20 mL) in a 100-mL flask, under a nitrogen atmosphere. The mixture is heated to reflux with stirring and maintained at reflux for 20 min. The resulting suspension is cooled on ice. Filtration gives white crystals, which are redissolved in dichloromethane and filtered through a Celite pad. Ethanol is added, and the dichloromethane is removed under reduced pressure. Filtration gives white crystals, which are washed with absolute ethanol (4 x 25 mL) and hexane (4 x 25 mL) and dried at room temperature. Yield 1.22-1.72g (65-91%). 

Benzyl-2,4,6-triphenyl-4//-thiopyran (2451) reacts with perchloric acid with loss of the 4-benzyl group to afford perchlorate 404.236 A similar elimination of the substituents was found for 4-benzyl derivatives 253.3<8 The reported conversion of 4,4-dichloro-4//-thiopyran (336b) to perchlorate 408, involving the loss of a 4-chlorine,325 is not an oxidation process. Similar transformations are also reported.349... 

METHYL KETONES AUyltrimethyl-silane, Bis(acetonitrilo)chloronitro-palladium (11). Dicarb ony lbis( triphenyl-phosphine)nickel. Dichloro-dicyano-benzoquinone. Hydrogen peroxide-Palladium acetate. Meldrum s acid. Palladium r-butyl peroxide trilluoro-acctate. Palladium tl) chloride. 

Compounds according to entries 1, nitrato-triphenyl-(pyridine-N-oxide)tin 2, (l,2-benzisothiazol-3(2//)-one-l,l-dioxide)-(quinoline-N-oxide)triphenyltin 3, chloro-(2,6-dimethylpyridine-N-oxide)trimethyltin 4, dichloro-(2,6-dimethylpyridine-N-oxide)diphenyltin 5, (coumarin-3-carboxylato)(quinoline-N-oxide)triphenyltin 6, isocyanato-(pyridine-N-oxide-O)-triphenyltin 7, bis(A,A)-dimethyldithiocarbamoylKacetato-0)(quinoline-N-oxide)tnphenyl-tin 8, (isopropylxanthato)(quinoline-N-oxide)triphenyltin. 

CPSC staff performed a preliminary assessment of the potential health risks associated with the use of selected FR chemicals in upholstered furniture foam. FR-treated foam samples that could be used to meet the draft standard and were available to the CPSC staff for testing included melamine tris(l,3-dichloro-2-propyl)phosphate (TDCP) a mixture containing triphenyl phosphate (TPP), phenol isopropylated phosphate (PIP), and octyl tetrabromobenzoate (OTB). Other flame-retardants that could be used in foam have been discussed by the U.S. EPA Design for the Environment Program. Based on limited exposure or toxicity data, the following preliminary conclusions were published in 2006 ... 

Phosphorus in both the 3 and 5 coordination states can be introduced into this class of heterocycle (Scheme 19). The diaminopyrimidine (189 R1 = R2 = H) reacts with triphenyl phosphite to give the phosphorus(III) derivative (95) <79Mi 713-01). By the use of phosphorus pentachloride the dichloro compounds (97) are formed <70K.GS7io>, whilst phenyl phosphonamide produces the derivatives (190) <63CI(L)819>. 

Besides saturated 1,5-diketones, unsaturated 1,5-diketones can also, in some cases, be converted into thiopyrylium salts. The reaction of aryl substituted 2,4-dichloro-2-pentene-1,5-diones (87) with HjS and HCIO4 in a mixture of AcOH and AC2O leads to the formation of 3-chlorothiopyrylium perchlorates 88-90. It should be noted that under the same conditions l,3,5-triphenyl-2-pentene-l,5-dione is converted quantitatively into the corresponding pyrylium salt 8. The pentenediones not containing chlorine atoms in the molecule evidently do not react with H2S under the conditions of acid catalysis as a result of the fact that the cyclization rate for them significantly exceeds the addition rate of H2S (90ZOR1904). 

Oxidmion of ketone acetals and ethers. Ketones can be regenerated from the ethylene acetal derivatives by treatment with trityl fluoroborate in dry dichloro-methanc (Nj) at room temperature. Thus the reaction of trityl fluoroborate with cyclohexanone ethylene acetal results in cyclohexanone (80%) and triphenylmethane. The reaction thus involves hydride transfer to the triphenyl carbonium ions. Triethyl-oxonium fluoroborate can also be used but is somewhat less effective than trityl fluoroborate. 

Diethyl a-hydroxyphosphonates (448) were converted into the corresponding a-thiocyanatophosphonates (449) using triphenyl phosphine, 2,3-dichloro-5,6-dicyanobenzoquinone and ammonium thiocyanate under neutral conditions (Figure 85). °°... 

A solution of 9.3 g (0.03 mol) of triphenyl phosphite in 100 mL of dichloro-methane is ozonized to form triphenyl phosphite ozonide. After the excess ozone is purged with nitrogen, a cold solution of 1.60 g (0.02 mol) of 1,3-cyclohexadiene in 45 mL of dichloromethane is added from a dropping funnel while the mixture is stirred by a stream of nitrogen and cooled with a dry-ice-acetone bath. After the removal of the bath, the mixture is allowed to warm to room temperature. The solution is concentrated on a rotary evaporator, and the residue is distilled at less than 0.1 mm of Hg in a short-path still to give 1.51 g (67.4%) of pale-yellow semisolid 3,6-endooxocyclohexene, which, after three recrystallizations from pentane, melts at 90-91 °C. 

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