114628-35-2Relevant articles and documents
THIENOSPIRANS VI. SPIRO-SUBSTITUTED THIENOFURANS BY REGIOSELECTIVE LITHIATIONS
Sauter, Fritz,Stanetty, Peter,Froehlich, Hannes
, p. 2657 - 2672 (2007/10/02)
The title substances 3 were obtained by cyclization of 3,4-disubstituted thiophenes 5 and 6, prepared in one-pot reactions starting from 3,4-dibromothiophene by means of two consecutive lithiations and additions of carbonyl compounds.By a combination of v