5-benzoyl-1,2-diphenyl-4-methylthio

M Aq. K2CO3 added with stirring to a soln. of l,5-diphenyl-3-methylthio-2-pentene-1,5-dione in acetone at 20°, the mixture stirred at room temp, for 1.25 h, treated with I2, and stirring continued for 22 h - 2-benzoyl-3-methylthio-5-phenylfuran. Y 90%. F.e.s. M. Tinggaard et al., J. Heterocyc. Chem. 26, 439-44 (1989). 

N-Diphenylmethylen- 374 N-Diphenylmethylen-O-aminocarbonyl- 612 N-[l,3-Diphenyl-propyl-(2) - 374 N-[l,3-Diphenyl-propyliden-(2)]- 374, 377, 380 N-(4-Halogen-phenyI)- 683 N-Heptyl- 375 N-Heptyl-N-acetyl- 376 N-Heptyliden- 375 N-Hcptyliden-O-acetyl- 376 0-(2-Hydroxy-athyl)-N-athoxycarbonyl- 133 N-(4-Hydroxy-phenyl)- 683 0-(2-Hydroxy-l-phenyl-athyI)-N-athoxycarbonyI-aus 0-(ci-AthoxycarbonyI-benzyl)-N-athoxycar-bonyl-hydroxylamin und Lithiumalanat 133 N-Isopropyl- 682 N-Isopropylidcn- 613 N-Methyl- 133, 682 O-Methyl-N-bcnzyliden- 377 O-Methyl-N-benzyliden- 375 0-Methyl-N-(4-chlor-benzyl)- 375 0-Methyl-N-(4-chlor-benzyliden)- 375 N-Methy -N,0-diacetyI- 682 N-(4-Methyl-phenyl)- 683 0-McthyI-N-( 1 -phenyl-athyliden)- 375 N-(4-Methylthio-phenyl)- 684 N-(4-Nitro-benzyl)- 374 N-[4-Nitro-benzyliden - 374, 377 N-(2-Nitro-phenyl)- 562 N-(4-Nitro-phenyl)- 682 N-Nitroso-N-cyclohexyl- 697 N-Octyl- 374 N-Octyl-(2)-N-acetyl- 376 N-Octyliden- 374 N-0ctyliden-(2)-0-acctyl- 376 N-(Pentafluor-phenyl)-0,N-diacetyl- 697 N-Phenyl- 474, 481, 682, 783 N-Phenylacetyl-O-benzoyl- 265 N-(l-Phenyl-athyl)- 374 N-(l-Phenyl-athyl)-N-acetyl- 376 N-(l-Phenyl-athyliden)-374, 613 N-( l-Phenyl-athyliden)-0-acetyl- 376 N-[ 1 -Phenyl-buten-( 1 )-yl-(3)-iden]- 582 N-f4-Phenyl-butyl-(2)-iden]- 581 N-Phcnyl-N,0-diacetyl- 682 N-(4-Phenylthio-phenyl)- 684 N-Propyl-N-cyclohexyl- 376 N-Propyl-N-isopropyl- 376 O-Sulfonyl- 481 N-(4-Sulfonyl-phenyI)- 683 N-(2-Vinyl-phenyl)- 698... 

The treatment of di-t-butyl diimide with r-butylketene produces the isothiazolidin-3-one and diphenyl diimide with chlorocyanoketene gives 3-cyano-2,l-benzisothiazole (Scheme 26) <83H(20)187>. The reaction of benzoyl isothiocyanate with nitroketene S,N- and JV,Af-acetals (269) (X = MeS, R NH) yields the 3-methylthio and 3-amino-3-isothiazolines (270) (X = MeS, R NH) <82S65>. 

Ring Fission. The kinetics of the hydrolytic ring-scission of 2-methylthio-4,5-diphenyl-l,3,4-thiadiazolium iodide (111) to A -benzoyl-A -phenyldithiocarbamate (113) have been studied spectrophotometrically. Above pH 4, the reaction is of the first order and is almost independent of pH, in accord with the rate-determining formation of a neutral intermediate, e.g. (112), via a cationic transition state. 

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