Summary Hyellazole, a new carbazole alkaloid, was Hyella caespistosa, based upon the intramolecular cyclisa- synthesized via cyclisation of a 2,3-bis-vinylindole tion of a triene system. For this purpose, the 2,3-bis- derivative. ... WE report here the first total synthesis of hyellazole (l),' a new carbazole alkaloid, isolated from the blue-green alga ... Published on 01 January 1980. Downloaded by google on 29/03/2016 09:43:54. ... View Article Online / Journal Homepage / Table of ...