Diisopropyl xanthogen disulfide

A simple method for the preparation of l,3-dithiol-2-ones 196 using radical methodology has been reported [95CC1429]. The reaction involves heating of diisopropyl xanthogen disulfide 193 with a terminal alkyne at 80 °C in the presence of a radical initiator. The reaction conditions are compatible with a variety of functional groups on the alkyne. 

The l,3-dithiol-2-ones 511 were conveniently prepared in a one-step reaction involving diisopropyl xanthogen disulfide 510 and terminal alkyl and aryl alkynes in the presence of radical initiators (Scheme 73) <1995GC1429,1998H(48)2003>. This synthetic strategy was also applied to the preparation of the quinoxaline derivatives 512 <1997J(P1)801>. 

Dibutyl xanthogen disulfide p,p -Dichlorobenzoyl peroxide Dicumyl peroxide Diisopropyl xanthogen polysulfide N,N-Dimethylcyclohexylamine dibutyidithiocarbamate Dipentamethylene thiuram hexasulfide Diphenylguanidine Diphenylguanidine phthalate N,N -Diphenylthiourea 4,4 -Dithiodimorpholine Di-o-tolyl guanidine Ethylenediamine carbamate Hexahydro-1,3,5-triethyl-s-triazine 2-Mercaptobenzothiazole 2-Mercaptothiazoline... 

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