Diastereoselective Prins-Type Reaction of Cycloalkenylcyclopropanol Silyl Ethers and α,β-Unsaturated Aldehyde Acetals
作者:Ivan L. Lysenko、Heong-Sub Oh、Jin Kun Cha
DOI:10.1021/jo071272o
日期:2007.10.1
Electrophilic addition of 1-(1-cyclohexenyl)-1-cyclopropanol trimethylsilylether to α,β-unsaturated aldehyde acetals under Lewisacidic conditions proceeds with good to excellent diastereoselectivity to afford spirocyclobutanones containing three contiguous stereocenters. A convenient entry to enantioselective syntheses is available by use of a nonracemic C2-symmetric acetal. Elaboration of the resulting
Novel and facile selective reduction of carboxylic acid with a samarium diiodide–lanthanide triflate–methanol–base system
作者:Yasuko Kamochi、Tadahiro Kudo
DOI:10.1016/s0040-4039(99)02051-1
日期:2000.1
The facile selective reduction of carboxylic acids in the presence of an aldehyde or that bearing a formyl group proceeded smoothly with a samarium diiodide-lanthanide triflate-methanol-base system at room temperature to give the corresponding alcohols in good to almost quantitative yield. (C) 2000 Elsevier Science Ltd. All rights reserved.
Wasilew A. A., Zh. organ. khimii, 30 (1994) N 6, S 822-826