5-ethoxy- 1,3-diphenyl

Benzhydryloxy ethoxy diphenyl silane (2). To a solution of benzoyl triphenylsilane 1 (2.5 g, 6 9 mmol) in benzene (25 mL) was added a solution of sodium ethoxide in ethanol (2 mL, 0 S mmol). The solution changed colour and after 11 min laded airmst completely. The solution was washed with water and the solvent removed in vacuum. The oily residue was dissolved in hot ethanol (15 mL) and cooled to give 2 (2 1 g, 74%), np 67-75 C Recrystallizatlon from ethanol gave 1 8 g (64%). mp 77-78,C... 

BIS[2,2,2-TRIFLUORO-l-PHENYL-l-(TEIFLUOROMETHYL) ETHOXY] DIPHENYL SULFURANE... 

B. Bis[2,2,2-trifiuoro-l-phenyl-l- trijlucrromethyl[ethoxy] Diphenyl Sulfurane. Carbon tetrachloride is distilled directly from phosphorous pentoxide into a dry, 2-1., three-necked flask fitted with stoppers until... 

Synthetic applications of organosulfur reagents are expanding rapidly. Stable sulfuranes are included for the first time in BIS[2,-2,2-TRIPLUORO-l-PHENYL-l-(TRIFLUOROMETHYL)ETHOXY] diphenyl SULFURANE and DIETHYLAMINOSULFUR TRI-FLUORIDE. The latter is used to transform an alcohol to a fluoride in p-NITROBENZYL FLUORIDE. The direct homologation of a ketone to a nitrile by use of p-TOLYLSULFONYLMETHYL ISOCYANIDE is illustrated in 2-ADAMANTANECARBONITRILE. Reagents with... 

At - 78 °C, 0.2 molar solutions of 13 and the directing ligand ethoxi-diphenyl-phosphine were poured together under an inert gas atmosphere. After 5 minutes excess CO was added. The temperature was then allowed to raise to room temperature. The resulting ratio of the organic products was determined gas chromatographically. 

C NMR, 7, 498 (79TH51600) 2H-Azepine-4-carboxylic acid, 7-(4-bromophenyl)-3-methoxy-2-oxo-6-phenyl-X-ray, 7, 494 <79H(12)1423> 3H-A2epine-4-carboxylic acid, 6-acetyl-2-ethoxy-3-oxo-7-phenyl-, ethyl ester H NMR, 7, 503 <81H(16)363) 3H-Azepine-4-carboxylic acid, 2,6-diethoxy-3-oxo-7-phenyl-, ethyl ester H NMR, 7, 503 <81H(16)363) 3H-Azepine-4-carboxylic acid, 2-ethoxy-3-oxo-6,7-diphenyl-, ethyl ester HNMR, 7, 503 <81H(16)363) 3H-Azepine-4-carboxylic acid, 2-ethoxy-3-oxo-7-phenyl-, ethyl ester... 

Benzo[b]furan, 2,3-dihydro-2-phenyl-synthesis, 4, 697 Benzo[b]furan, 2,3-dihydroxy-tautomerism, 4, 37 Benzo[6]furan, 4,6-dimethoxy-acylation, 4, 606 Benzo[6]furan, 2,3-dimethyl-acetylation, 4, 606 bromination, 4, 605 photooxygenation, 4, 642 Benzo[b]furan, 5,6-dimethyl-2,3-diphenyl-applications, 4, 709 Benzo[b]furan, 1,3-diphenyl-vertical ionization potential, 4, 587 Benzo[b]furan, 2-ethoxy-5-hydroxy-synthesis, 4, 127... 

With the synthesis of the benzylidene hydrazones of selenazoles, it was possible to prepare formazans containing a selenazole ring. Of the compounds already described (Section I,C,1), 2-benzylidene-hydrazino-4,5-diphenyl- and 2-benzylidenehydrazino-4-methyl-5-carb-ethoxy-selenazole were used to couple with diazonium salts in order... 

The starting material may be produced by reacting 6-amino-2-methylthiopyrimidine with ethoxymethylene malonic acid diethyl ester. The intermediate thus produced is converted by boiling in diphenyl ether to 6-ethoxycarbonyl-2-methylthio-5-oxo-5,B-dihydropyrido-[2,3-d]pyrimidine. That is hydrolyzed by sodium hydroxide to cleave the ethoxy group and then ethylated with diethyl sulfate to give the starting material. 

Ethyl 3-ethoxy-4-oxo-l,7-diphenyl-2-azabicyclo[3.2.0]hept-2-ene-5-carboxylate (8) with tin(IV) chloride in dichloromethane undergoes ring expansion to the 4/7-azepine 9.48... 

Lithium aluminum hydride, in reduction of 3-ethoxy-2-cyclohexenone to 2-cyclohexenone, 40, 14 Lithium ethoxide in condensation of benzaldehyde with tripbenylcin-namylphosphonium chloride to form 1,4-diphenyl-l, 3-butadiene,... 

Acetonitrile, diphenyl-, 55, 94, 102 Acetonitrile, diphenyl-2-( 1 ethoxyvinyl) [Acetonitrile, diphenyl 2 (1 ethoxy ethenyl) ], 55, 102 Acetonitrile, phenyl-, 55, 91,94 Acetophenone, 4-chloro- [Ethanone, l-(4-chlorophenyl)-[, 55, 40... 

Z)-1,2-diphenyl-1 -[4-[2-(dimethy(amfno ethoxy]pheny) -1 -buten-4-ol (III)... 

Condensation of aminopyrazole 116 with ethoxy-methylene malonic ester gives the product of addition-elimination (117), which is then cyclized to the piperidone by heating in diphenyl ether. The product tautomerizes spontaneously to the hydroxypyridine 118. The hydroxyl group is then converted to the chloro derivative by means of phosphorus oxychloride (119). Displacement of halogen by n-butylamine gives... 

Related to quinocyclopropenes of type 61a is the fulvalene dione system 132 synthesized recently from tropolone103 (and its 1,6-disubstituted derivatives104)) by means of the ethoxy cation 75. Of the cations 129/130 formed, primarily 129 is deprotonated to diphenyl heptatriafulvalene-3,4-dione (132) ... 

A final type of cyclopropenium cyanines is found in the azatriapentafulvalenium ions 145,146, and 147/148, which have been prepared93,112,113 from diphenyl and di-n-propyl cyclopropenone or ethoxy cation 75 and indole derivatives as well as from diphenyl methylthio cyclopropenium cation and phenyl-substituted pyr-roles114> ... 

The synthesis of cyclopropenone imines 3 has been accomplished by several methods. Thus aromatic amines, e.g. p-nitraniline, can be reacted either with diphenyl cyclopropenone in HCl/ethanol or with the ethoxy cation 75 forming the immonium cation 150, which is deprotonated by tertiary bases to the N-(p-nitro-phenyl)-imine /5/llsl ... 

Of the further functional derivatives of cyclopropenones in the diphenyl series, the oxime115,121) and several hydrazones115) (e.g. 158/159), and a2ines (e.g. 760U5)), are easily available from the ethoxy cation 75 and hydroxylamine, hydrazines, and hydrazones, respectively. Sometimes oximation of cyclopropenones produces unexpected results (see later and Ref.42 ). 

Analogous dienophilic behavior is shown by diphenyl cyclopropenone towards oxazoles235 (isoxazoles behave quite different, see p. 78) giving rise to 3-ethoxy-2,6-diphenyl pyrone-4 (366), which may result from a primary Diels-Alder adduct 365 stabilized by elimination of nitrile ... 

Scheme 25). l-Oxo-2,8-diphenyl-2,5,8 triaza-1 X -phosphabicyclo[3.3.0]octane (68) formed by acid catalysis of the bicyclic phosphoric triamide (67) has been found to isomerize via a new type of rearrangement to yield the ring contracted 3-[2-(phenylamino)ethyl]-2-oxo-2-ethoxy-l-phenyl-l,3,2 A, -diazaphospholidine (69). The rearrangement has been explained in terms of intramolecular 1,5-nucleophilic attack... 

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