A short and novel synthesis of hitherto unknown 3-allylbenzofurans is described. Wittig olefination of protected 2-hydroxybenzaldehydes followed by Claisen rearrangement resulted in the formation of pent-4-en-als. These, on deprotection and dehydration, gave 3-allylbenzofurans.
本文介绍了一种迄今未知的 3-烯丙基
苯并呋喃的简短而新颖的合成方法。受保护的 2-hydroxybenzaldehydes 经过 Wittig 烯化,然后进行 Claisen 重排,生成了戊-4-烯醛。这些物质经脱保护和脱
水后得到 3-烯丙基
苯并呋喃。