Dibutyl- -diphenyl

The addition of lithium dimethyl-, dibutyl-, diphenyl- or 1-butenylcuprate to 2d produced (JiS) 94% ee, ifiS) 95% ee, (jiR) 96% ec, and ifiR) 90% ee, respectively. In this case the difference between S and R results from the CIP selection rules and not to the steric course of the reactions. The conformation of the chiral auxiliary in 1 d is such that one IV-methyl group is axially, the other equatorially, arranged on the bicyclic structure. The reagents attack the double bond from the side opposite to the equatorial iV-methyl group. Other chiral auxiliaries such as a-c14 were less effective15. 

Also, the higher alkyl derivatives of lead are not as efficient as the tetraethyl compound. Thus, the butyl triethyl lead derivatives are only about 85 per cent as effective in suppressing knock as is the tetraethyl compound.18 The dibutyl diphenyl lead compounds range from 33 to 45 per cent as good as lead tetraethyl. While the various quadrivalent derivatives of lead show varying degrees of antiknock action, the bivalent derivatives with a few exceptions show no action. 

II. Magnesium hydride is formed when magnesium dialkyls (diethyl, dibutyl, diphenyl) or the corresponding Grignard compounds are heated to 175-200°C under high vacuum for several hours. 

It is of interest to compare results derived from utilizing the classical aqueous interfacial (CAIS) with those derived from utilizing the bisethylenediamine copper (BEDC) system reported in references 9 and 17. The yield of modified product is higher for the CAIS systems but the general overall yield trend as the stan-nane is varied is similar, indicating that the overall reaction pathways are similar for the two systems (yield trends CAIS -triphenyl >dioctyl >dibutyl > diphenyl > dimethyl BEDC-triphenyl > dioctyl > dimethyl > dibutyl > diphenyl). These trends have been established over only a narrow set of reaction conditions and should be more fully developed before acceptance as overall yield trends. 

Cyanoborohydride has been used under catalytic nonpolar conditions [14] as well as stoichiometrically in cation solvating media [13]. Sodium cyanoborohydride can be solubilized in dichloromethane by complexation with 18-crown-6. In dichloromethane Omethylsulfoxonium salts are reduced to the corresponding sulfides in good yield (see Sect. 13.8 and Eqs. 12.5 and 13.24). The methyl fluorosulfonate salts of dibutyl-, diphenyl-, and dibenzyl sulfoxides are reduced to the corresponding sulfides in 85%, 77% and 91%yields, respectively [14]. 

The reduction of alkoxysulfonium salts (formed by alkylation of sulfoxides with methyl fluorosulfonate) with sodium cyanohydridoborate in dichloromethane is catalyzed by 18-crown-6 [32] (see Eq. 13.24). By this method, dibutyl, diphenyl, dibenzyl, and tetramethylene sulfoxides are reduced to the corresponding sulfides in 85%, 77%, 91%, and 87% yields, respectively. 

Synthesis of another series of novel a-aminophosphonates (48) involving the one-pot condensation reaction of substituted aromatic/ heterocyclic aldehydes (44), 2-amino-6-metho y-benzothiazole (47) and dibutyl/diphenyl phosphites (37) in toluene under microwave irradiation in the absence of any catalyst has also been accomplished by Janardhan Rao et al. (Scheme 22). The new compounds showed promising antimicrobial and anti-oxidant activities, depending on the nature of bioactive groups at the a-carbon. 

PVB resins are also compatible with a limited number of plasticizers and resins. Plasticizers (qv) improve processibility, lower T, and increase flexibihty and resiUency over a broad temperature range. Usehil plasticizers include dibutyl and butyl benzyl phthalates, tricresyl and 2-ethylhexyl diphenyl phosphates, butyl ricinoleate, dibutyl sebacate, dihexyl adipate, triethylene glycol di-2-ethylbutyrate, tetraethylene glycol diheptanoate, castor oil, and others (64-73). 

S,S -Dipropyl Acetals and Ketals RR C(SC3H7)2 S,S -Dibutyl Acetals and Ketals RR C(SC4H9)2 S,S -Dipentyl Acetals and Ketals RR C(SC5H i, )2 S,S -Diphenyl Acetals and Ketals RR C(SC6H )2 S,S -Dibenzyl Acetals and Ketals RR C(SCH2C6H5)2... 

Natriumboranat/Kobalt(II)-chlorid (s.S. 115) reduziert aliphatische undaroma-tische Sulfoxide in Athanol mit guten Ausbeuten zu den entsprechenden Sulfanen. Mit dieser Methode erhalt man7 z.B. Dibutyl-sulfan (98% d.Th.), Diphenyl-sulfan (95% d. Th.) oder Thiuxanthen (100H/o d. Th.). Dibenzyl-sulfoxid und Tetrahydro-thiophen-1-oxid werden praktisch nicht angegriffen. 

Dibutyl- -dihydrid 34 Diphenyl- -dihydrid 34 Organo- -hydride Anwendung 34 Eigenschaften 34 markierte 34 Triathyl- -hydrid 33 Tributyl- -hydrid 33 Trimethyl- -hydrid 33 Triphenyl- -hydrid 33... 

Inductively coupled plasma mass spectrometry was applied to the analysis of six organotin compounds (chlorides of dimethyl-, dibutyl-, trimethyl-, tributyl-, diphenyl-, and triphenyltin). Detection hmits for the six organotins ranged from 24 to 51 pg as tin the dynamic range was over lO, from 1 pg/1 to 10 mg/1 (Inoue Kawabata, 1993). 

AChE = acetylcholinesterase Bd Wt = body weight BTP = butylated triphenyl phospate BUN = blood urea nitrogen (C) = capsule Cardio = cardiovascular d = day(s) deer. = decreased DBPP = dibutylated phenyl phosphate 2EDP = 2-ethylhexyl diphenyl phosphate Endocr = endocrine F = female (G) = gavage Gastro = gastrointestinal ... 

Major components Napthenic type petroleum oil Petroleum products with additives T rixylyl phosphate Triphenyl phosphate t-butyl phenyl diphenyl phosphate di-t-butylphenyl phenyl phosphate little to no tri-(t-butylphenyl) phosphate Trimers of polyalphaolefin Tributyl-phosphate and dibutyl phenyl phosphate base stock... 

Characteristic Isopropyl phenyl diphenyl ester t-Butylphenyl diphenyl phosphate Dibutyl phenyl phosphate Nonylphenyl diphenyl phosphate... 

Major components 100 Mixture of isomers 100B Santicizer 154 Dibutyl phenyl phosphate Nonylphenyl diphenyl... 

Monsanto. 1987c. In vivo/in vitro neurotoxicity studies of Skydrol LD-4 in adult hens with mixtures of butyl diphenyl phosphate, dibutyl phenyl phosphate and tributyl phosphate. 

Plasticizers are used in the polymer industry to improve flexibility, workability, and general handling properties. Dibutyl sebacate and phthalates, such as dibutyl phthalate, diethyl phthalate, dicyclohexyl phthalate, butylbenzyl phthalate, and diphenyl-2-ethylhexyl phosphate, serve widely as plasticizers in vinylidene chloride copolymers, nitrocellulose-coated regenerated cellulose film, and cellulose acetate (Castle et ah, 1988a). In PVC, di(2-ethylhexyl)... 

Other stabilizers, which are primarily used abroad, include Akardit I (as-diphenylurea), Central it I (sym-diethyldiphenylurea), Central it II (sym-dimethyldiphenylurea), Centralit 111 (methylethyldiphenylurea), Akardit II (methyl-diphenylurea), Akardit 111 (ethyldiphenylurea), ethyl — and methylphenylurethanes, diphenyl-urethanes, dibutyl and diamyl phthalates, camphor and vaseline... 

Carbamoyl methyl Phosphine Oxide Derivatives The physicochemical properties of various aryl derivatives of CMPO have been investigated at the Vernadsky Institute of Geochemistry and Analytical Chemistry. Extraction of americium and lanthanides from nitric acid with solutions of diphenyl- and dibutyl-(diethylcarbamoylmethyl) phosphine oxides (Ph2Et2-CMPO and Bu2Et2-CMPO) in dichloroethane have been investigated as a function of the concentrations of the extractants and nitric acid (110, 111). The observed dependences are characterized... 

Manufacturer Base Nitro cellulose Nitro glycerin Dinitro toluene Diphenyl amine Ethyl centralite Dibutyl phthalate... 

Dimethyl-dithiophosphinsaure-anhydrid Dibutyl- dithiophosphinsaure-anhydrid Dibenzyl-dithiophosphinsdure-anhydrid Diphenyl-dithiophosphinsdure-anhydrid... 

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