名称:
Synthesis of 3,8,13,18-tetrachloro-2,7,12,17-tetramethoxyporphyrin
摘要:
Vilsmeier-Haack formylation of 3,4-dimethoxypyrrole led to the unprecedented formation of 3-chloro-4-methoxypyrrole-2-aldehyde instead of the desired dialdehyde. Subsequent reduction and acid catalyzed cyclization led to the formation of type I, 3,8,13,18-tetrachloro-2,7,12,17-tetramethoxyporphyrin in approximately 6% yield. (C) 2011 Elsevier Ltd. All rights reserved.