Synthesis of Functionalized Salicylates by Formal [3+3] Cyclocondensation of 1,3-Bis(silyloxy)buta-1,3-dienes with 3-Alkoxy-2-en-1-ones
作者:Peter Langer、Gerson Mroß、Simone Ladzik、Helmut Reinke、Anke Spannenberg、Christine Fischer
DOI:10.1055/s-0029-1216814
日期:2009.7
The formal [3+3] cyclization of 1,3-bis(silyloxy)buta-1,3-dienes with 1-aryl-3-ethoxyprop-2-en-1-ones, available by Heck reaction of benzoyl chlorides with ethyl vinyl ether, afforded a variety of 6-arylsalicylates. The reaction of the products with concentrated sulfuric acid resulted in the formation of fluorenones. 6-Alkylsalicylates were prepared by cyclization of 1,3-bis(silyloxy)buta-1,3-dienes
1,3-双(甲硅烷氧基)丁1,3-二烯与1-芳基-3-乙氧基丙-2-烯-1-酮的正式[3 + 3]环化,可通过苯甲酰氯与乙基的Heck反应获得乙烯基醚,得到各种6-芳基水杨酸酯。产物与浓硫酸的反应导致芴酮的形成。通过将1,3-双(甲硅烷氧基)丁1,3-二烯与脂族烯酮环合制备6-烷基水杨酸酯。 芳烃-环化-钯-区域选择性-甲硅烷基烯醇醚