Stabilization of reactive aldehydes by complexation with methylaluminum bis(2,6-diphenylphenoxide) and their synthetic application
作者:Keiji Maruoka、Arnel B. Concepcion、Noriaki Murase、Masataka Oishi、Naoki Hirayama、Hisashi Yamamoto
DOI:10.1021/ja00063a013
日期:1993.5
Reactive aldehydes such as formaldehyde and α-chloro aldehydes can be successfully generated by treatment of readily available trioxane and α-chloro aldehyde trimers, respectively, with methylaluminum bis(2,6-diphenylphenoxide) (MAPH), and stabilized as their 1:1 coordination complexes with MAPH. The resulting CH 2 =O.MAPH complex reacts with a variety of olefins to furnish ene-reaction products with
Cis Selective Wittig Olefination of α-Alkoxy Ketones and Its Application to the Stereoselective Synthesis of Plaunotol
作者:Seiichi Inoue、Kiyoshi Honda、Norimichi Iwase、Kikumasa Sato
DOI:10.1246/bcsj.63.1629
日期:1990.6
Several Wittigolefinations between α-heterosubstituted acetones and a phosphorus ylide were investigated concerning the product stereoselectivity. Benzyloxyacetone and tetrahydropyranyloxyacetone furnished trisubstituted (Z)-olefins exclusively. The stereoselective preparation of oxygenated acyclic terpenoids was practical by use of the direct Wittigolefination toward α-alkoxy ketones, and it facilitated
Lipase-catalyzed kinetic resolution of gamma-cyclogeraniol by Candida antarctica lipase B yielded 23% of enantiomerically pure (S)-gamma-cyclogeraniol. (+)-trixagol and (+)-luffarin-P were synthesized from the obtained (S)-gamma-cyclogeraniol, and the absolute configuration of natural (+)-luffarin-P was determined to have an S configuration by our first synthesis of (S)-luffarin-P for the first time. (C) 2015 Elsevier B.V. All rights reserved.
HAJOS, Z. G.
作者:HAJOS, Z. G.
DOI:——
日期:——
SATO, KIKUMASA;MIYAMOTO, OSAMU;INOUE, SEIICHI;IWASE, NORIMICHI;HONDA, KIY+, CHEM. LETT.,(1988) N 8, C. 1433-1436