Three new synthetic methods for the 1,2,3,3a,8,8a-hexa-hydropyrrolo[2,3-b]indoles having an alkoxy group at the 3a-position

Three methods have been newly developed for the synthesis of 1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indoles. Employing them, 3a-chloro-, 3a-bromo-, 3a-hydroxy-, and various 3a-alkoxy-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indoles are now readily available.