Synthesis of Phenylseleno Sugars from Epoxides and of α,β‐Unsaturated Carbonyl Derivatives for the Study of Their Insecticidal Activity
摘要:
This work reports the synthesis of sugar epoxides and their derivatives obtained by reaction with the dianion of phenyl selenoacetic acid. Approaches to the introduction of alpha,beta-unsaturated carbonyl units in pyranoid systems were investigated. Preparation of a protected D-glycero-hex-3-enepyranosid-2-ulose and of a D-erythro-hex-2-enono-1,5-lactone is described. Some of the synthesized compounds possess insecticidal activity against fruit flies, house flies, and white flies.
A Diastereoselective Unique Route to Cyclopropanes Functionalized at All Three Ring Carbon Atoms from Acyclic Vinyl Sulfone-Modified Carbohydrates
作者:Ananta Kumar Atta、Tanmaya Pathak
DOI:10.1021/jo802709q
日期:2009.4.3
In a departure from the current trend of using metal-catalyzed routes to cyclopropanation, pentosyl and hexosyl vinylsulfone-modifiedcarbohydrates having the terminal double bond and a suitably positioned leaving group are reacted in a stereoselective fashion with a series of nucleophiles to yield a myriad of cyclopropanes substituted at all three ring carbon atoms.
Synthesis of Phenylseleno Sugars from Epoxides and of α,β‐Unsaturated Carbonyl Derivatives for the Study of Their Insecticidal Activity
作者:Amélia P. Rauter、Tana Canda、Jorge Justino、Maria I. Ismael、José A. Figueiredo
DOI:10.1081/car-200030077
日期:2004.12.29
This work reports the synthesis of sugar epoxides and their derivatives obtained by reaction with the dianion of phenyl selenoacetic acid. Approaches to the introduction of alpha,beta-unsaturated carbonyl units in pyranoid systems were investigated. Preparation of a protected D-glycero-hex-3-enepyranosid-2-ulose and of a D-erythro-hex-2-enono-1,5-lactone is described. Some of the synthesized compounds possess insecticidal activity against fruit flies, house flies, and white flies.