Treatment of 3,8-diacetyldeuteroporphyrin IX dimethyl ester 6 with phosphoryl chloride and N,N-dimethylformamide gives the 3,8-bis(1-chloro-2-formylvinyl) derivative 7 which affords the corresponding 3,8-diethynyl derivative 2 upon treatment with base; compound 2 and its iron(III) chloride dimethyl ester are fully characterized.
X. Jiang and K. M. Smith, J. Chem. Soc., Chem. Commun., 1993, 1054 DOI: 10.1039/C39930001054
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