Carbonyl compounds are converted, in good yields, into their 1,3-dioxolanes over zeolite HSZ-360, as a new reusable catalyst. Good chemoselectivity is also observed. (C) 1998 Elsevier Science Ltd. All rights reserved.
A remarkable iodine-catalyzed protection of carbonyl compounds
作者:Bimal K. Banik、Marin Chapa、Jocabed Marquez、Magda Cardona
DOI:10.1016/j.tetlet.2005.01.176
日期:2005.3
report here a remarkably simple molecular iodine-catalyzed protection method for various carbonyl compounds as ketals in a general reaction. The iodine-catalyzed reaction of mandelic acid and lacticacid with several aldehydes has furnished a highly diastereoselectivesynthesis of cis and trans dioxolanones.