专利号:US-5519131-A 优先权日:1991-04-15 标题:Synthesis of pyridooxazinyl-indoles 发明人:EFFLAND RICHARD C; DAVIS LARRY; OLSEN GORDON E 权利人:HOECHST MARION ROUSSEL INC 摘要:This application relates to a process for the preparation of indolylpyridooxazines of the formula wherein R1, R2 and R3 are as defined in the specification which comprises cyclizing compound of the formula in the presence of a strong base such as sodium hydride or potassium t-butoxide.
专利号:RU-2060254-C1 优先权日:1991-04-17 标 题:Substituted 3-(pyridinylamino)-indoles or -benzo[b]thiophenes and a method of their synthesis