139118-27-7Relevant articles and documents
Novel Preparation and Photochromic Properties of 2,4,4,6-Tetraaryl-4H-thiopyrans
Sebek, Pavel,Nespurek, Stanislav,Hrabal, Richard,Adamec, Mojmir,Kuthan, Josef
, p. 1301 - 1308 (2007/10/02)
1,3,3,5-Tetraarylpentane-1,5-diones 2 and 5 react with tetraphosphodecasulfide in xylene at elevated temperature to give the corresponding 2,4,4,6-tetraaryl-4H-thiopyrans 4 and 7.The mechanism of this transformation involves a fast initial step of dehydra