Efficient total synthesis of naturally occurring anti-TMV compound gramniphenol G
作者:Raju M. Walunj、Arun D. Natu、Madhusudan V. Paradkar、Supada R. Rojatkar
DOI:10.1080/00397911.2016.1207782
日期:2016.9.1
ABSTRACT An efficient synthesis of Gramniphenol G identified as 2-(4′-Methoxyphenyl)-7,7-dimethyl-7H-furo[3,2-g]chromene and originally isolated from the plant Arundina gramnifolia belonging to orchidaceae family was accomplished starting from resorcinol. The key step involves the oxidative cyclization of o-vinyl phenol to provide benzofuran moiety. GRAPHICAL ABSTRACT
摘要 禾本科苯酚 G 的高效合成鉴定为 2-(4'-甲氧基苯基)-7,7-二甲基-7H-呋喃[3,2-g]色烯,最初从兰科植物 Arundina gramnifolia 中分离出来。来自间苯二酚。关键步骤涉及邻乙烯基苯酚的氧化环化以提供苯并呋喃部分。图形概要
On the synthesis of substituted 2,2-dimethyl1-4-chromanones and related compounds
A systematic study of the reaction of a series of monosubstituted phenols 3 and 3-methylbut-2-enoic acid 4 in phosphorusoxychloride/zinc chloride revealed that the formation of 4-chromanones was strongly infuenced by the substituents and their position on the aromatic ring of the starting phenols.