Enhanced O-dealkylation activity of SiCl4/LiI with catalytic amount of BF3
摘要:
Dibenzyloydihydrobenzoxathiin 1, which resisted debenzylation with SiCl4/LiI, was effectively debenzylated with SiCl4/ LiI in the presence of a catalytic amount of BF3. The HCI salt of the bis-debenzylated product 2 was isolated in 90%, yield and 99% purity. This enhanced dealkylation activity has also been observed with other substrates. (C) 2004 Published by Elsevier Ltd.