One-Pot, Two-Step Synthesis of Substituted Anthraquinones from Chromium(0) Alkynyl Carbenes and Isobenzofurans
作者:José Barluenga、Silvia Martínez、Angel L. Suárez-Sobrino、Miguel Tomás
DOI:10.1021/ol703037q
日期:2008.2.1
isobenzofurans gives rise to the corresponding [4 + 2] cycloadducts. The newly formed carbene adducts are suitable for benzannulation processes in the presence of tert-butylisocyanide or carbon monoxide to yield a variety of new highly substituted polycyclic structures having the anthraquinone framework. The whole two-step process is conducted in a one-pot fashion from easily available 1,4-dihydro-1,4-epoxynaphthalenes
炔基费希尔卡宾苯与异苯并呋喃的反应产生相应的[4 + 2]环加合物。新形成的卡宾加合物适用于叔丁基异氰化物或一氧化碳存在下的苯环化工艺,以产生具有蒽醌骨架的各种新的高度取代的多环结构。整个两步过程是从容易获得的1,4-二氢-1,4-环氧萘以一锅法进行的。