121st General Meeting of the KCS

Type Poster Presentation
Area Organic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code ORGN.P-478
Subject A Highly Efficient Asymmetric Gamma Carbonyl Addition Reaction of 2-Alkylallenoates: Toward a Synthesis of (+)-Phellilane D
Authors Heejung Jeong, Gyungah Pak, Euijin Park1, Jimin Kim*, Chan-Mo Yu2,*
Department of Chemistry, Chonnam National University, Korea
1Department of chemistry, Chonnam National University, Korea
2Department of Chemistry, Sungkyunkwan University, Korea
Abstract

In light of widespread advances in asymmetric methods, aldol reactions of carbonyl functionalities led to significant developments in the area of asymmetric synthesis. Recently, we have disclosed a new aldol method of the allenoate process in forming 2-hydroxy allenolate in high levels of enantioselectivity. For this method the reactin exclusively dictates a regioselectivity starting from methyl allenoate. As part of our continuous investigations utilizing allenoates as versatile substrates for asymmetric carbonyl additions, we establish stereospecific formation of gamma-addition adduct from 2-alkyl allenoates to construct axial and center chiralities during the reaction, which allows in good yields and excellent stereoselectivities. Reaction usually produced only single regio- and stereisomer. We would like to present herein scope and limitation of the reaction and its synthetic applications to bioactive natural product (+)-phellilane D.

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