6a-Thiathiophthens and related compounds. Part II. Substitution reactions
Abstract
Bromination of 2,5-disubstituted 6a-thiathiophthens [1,6,6aS(IV)-trithiapentalenes] yields monosubstitution products, but nitrosation is accompanied by rearrangement, leading to 3-nitrosomethylene-1,2-dithioles in which the oxygen atom of the nitroso-group is probably bonded to the adjacent sulphur atom. 2-Methylthio-5-phenyl-6a-thiathiophthen undergoes nitration in the 3-position.