Photolysis ethyl sulfides

Photolysis of methyl 2-(o-iodophenyl)ethyl sulfide (I, R=CH3) in a cyclohexane solution gives a... 

Products of Photolysis of Methyl 2-(o-Iodophenyl)ethyl Sulfide d)... 

Extended irradiation of the diethyl dithioacetal 44 increases the yield of L-fucitol (46) at the expense of 1-S-ethyl-l-thio-D-galactitol (45) also galactitol (52) was isolated from the photolysis mixture.109 The intermediacy of 45 in the formation of 46, a possibility that was suggested by the extended photolysis of 44, is supported by the observation that irradiation of 45 in methanol produces L-fucitol (46) in 44% yield.109 (Compounds 47 and 52 also are formed during irradiation of 45, but in low yield.) The mechanism for sulfide photoreaction parallels that109 for the alkyl dithioacetals (see Scheme 18). 

Qualitative work on the photolysis of a number of alkyl aralkyl sulfides indicates that the observed products arise from radical reactions of aromatic and thiyl free radicals formed in the primary process. In the case of ethyl a-methylbenzyl sulfide an intramolecular reaction was proposed... 

The liquid phase photolysis of dimethyl disulfide (2537 A) has been reported to produce dimethyl sulfide and dimethyl trisulfide in equal quantities, and traces of CH4 and methyl tetrasulflde. Ethyl disulfide again gave mono, tri- and tetra-sulfides with a trace of ethyl mercaptan. All irradiations were prolonged, of the order 24-48 hours. It was claimed that C-S fission in the primary photolytic dissociation... 

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