Synthesis and absolute stereochemistry of hagen's-gland lactones in some parasitic wasps (Hymenoptera:Braconidae)
作者:Gregory C. Paddon-Jones、Christopher J. Moore、Douglas J. Brecknell、Wilfried A. König、William Kitching
DOI:10.1016/s0040-4039(97)00661-8
日期:1997.5
Efficient syntheses and enantioselective gas chromatography have confirmed the structures and established the absolute stereochemistry of some novel bicyclic lactones (tetrahydrofurofuranones) in species of parasitic wasps (Hymenoptera:Braconidae). The co-occurring γ-lactones, octan-4-olide and dodecan-4-olide, have the (R)-configuration.
A simple and efficient synthesis of Hagen's gland lactones was achieved using a sequential α-aminoxylation/oxa-Michael approach in a highly diastereoselective manner with assignment of relative configurations. This method was found to be applicable to the synthesis of various other isomers of Hagen's gland lactones.
Concise and stereoselective synthesis of (±)-Hagen's gland lactone
作者:Dongjoo Lee、Iljin Shin、Yoonjung Hwang、Kiyoun Lee、Seung-Yong Seo、Hyoungsu Kim
DOI:10.1039/c4ra11763h
日期:——
The synthesis of (±)-Hagen's gland lactone 1 has been completed in three steps in 44% from commercially available starting materials. The work is highlighted by a straightforward preparation of butenolide through an epoxide opening using 2-lithiofuran and a concise and stereoselectivesynthesis of furano-γ-lactone by a novel DBU-promoted sequential isomerization/intramolecular oxa-Michael addition
Efficient Palladium(II)-Mediated Construction of Functionalized Plakortone Cores
作者:Gregory C. Paddon-Jones、Natasha L. Hungerford、Patricia Hayes、William Kitching
DOI:10.1021/ol991055c
日期:1999.12.1
[GRAPHICS]Appropriate enediols experience a one-pot palladium(II)-mediated hydroxycyclization-carbonylation-lactonization sequence to provide sidechain-functionalized 2,6-dioxabicyclo[3.3.0]octan-3-ones, the core structures of the plakortones, a novel class of activators of cardiac SR-Ca2+-pumping ATPase, from the sponge Plakortis halichondrioides.
A concise synthesis of Hagen’s gland lactones
作者:Ali Mohd Lone、Bilal Ahmad Bhat、Wajaht Amin Shah、Goverdhan Mehta