Synthesis of Isoindoles. Acid or Base Induced Cyclization of 2-Cyanobenzaldehyde with Alcohols
作者:Ryu Sato、Michiko Ohmori、Fumiko Kaitani、Akiko Kurosawa、Toshihide Senzaki、Takehiko Goto、Minoru Saito
DOI:10.1246/bcsj.61.2481
日期:1988.7
acid catalyst such as silica gel. In the reaction using a base catalyst such as triethylamine and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 3-alkoxy-2,3-dihydro-1H-isoindol-1-ones (4) were formed via 3-alkoxy-1,3-dihydro-1-isobenzofuranimine (3). The use of 1,4-diazabicyclo[2.2.2]octane (DABCO) and N,N,N′,N′-tetramethylethylenediamine (TMEDA) gave 2 besides 3 and 4. A convenient and selective synthesis
在酸性催化剂如硅胶的存在下,通过用醇处理2-氰基苯甲醛(1)获得各种3,3-二烷氧基-2,3-二氢-1-羟基-1H-异吲哚(2)。在使用碱催化剂如三乙胺和 1,8-二氮杂双环 [5.4.0]undec-7-ene (DBU) 的反应中,3-alkoxy-2,3-dihydro-1H-isoindol-1-ones (4)是通过 3-alkoxy-1,3-dihydro-1-isobenzofuranimine (3) 形成的。使用 1,4-二氮杂双环 [2.2.2] 辛烷 (DABCO) 和 N,N,N',N'-四甲基乙二胺 (TMEDA) 可得到除 3 和 4 之外的 2。异吲哚及其衍生物的方便和选择性合成是描述。