ChemInform Abstract: Synthesis and Properties of New π-Donor Sulfur Heterocycles.
Abstract
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ChemInform Abstract
Reaction of the thione (I) with methyl triflate (II) followed by boranate reduction yields the trithioorthoformate (III) which is successively coupled with triphenylphosphine (IV) and glyoxal (VII), forming the aldehyde (VIII). This reacts with the phosphonium salt (IX) or the phosphonate (XIII) to give the ethanediylidene-2,2′-bis(1,3- dithioles) (X) and (XIV) respectively. Decarbomethoxylation of (X) by means of lithium bromide in HMPA produces the parent compound (XI).
