Synthesis of protected derivatives of 3-pyrrolylalanine
摘要:
Protected derivatives of 3-pyrrolylalanine (3-PA) have been synthesized starting with N-tri(isopropyl)silylpyrrole. Following formylation and Boc protection, treatment with (+/-)-N-(benzyloxycarbonyl)-alpha-phosphonoglycine trimethyl ester provided a fully protected dehydro-3-pyrrolylalanine. Reduction of the double bond and removal of the methyl ester groups yielded 3-PA protected at the alpha- and pyrrole nitrogens. 3-PA is only transiently stable following N-deprotection. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis of protected derivatives of 3-pyrrolylalanine
摘要:
Protected derivatives of 3-pyrrolylalanine (3-PA) have been synthesized starting with N-tri(isopropyl)silylpyrrole. Following formylation and Boc protection, treatment with (+/-)-N-(benzyloxycarbonyl)-alpha-phosphonoglycine trimethyl ester provided a fully protected dehydro-3-pyrrolylalanine. Reduction of the double bond and removal of the methyl ester groups yielded 3-PA protected at the alpha- and pyrrole nitrogens. 3-PA is only transiently stable following N-deprotection. (C) 1998 Elsevier Science Ltd. All rights reserved.