Synthesis of regioisomeric 2,5-bis-substituted-aza-benzothiopyranoindazoles
作者:A. Paul Krapcho、Simon N. Haydar
DOI:10.1002/jhet.5570380520
日期:2001.9
listed in Table 3 was accomplished by direct alkylations, acylations, followed by reduction of the amido group with Red-Al or lithiumaluminumhydride, or by reductive alkylations in the presence of sodium cyanoborohydride. The removal of the protective BOC-group was effected by treatment of the appropriate substrates with anhydrous hydrogen chloride to afford the respective hydrochloride salts listed