Organic preparations and procedures international

Improved Preparations of Symmetric Porphyrins

L Cheng, J Ma

Index: Cheng, Lingjiang; Ma, Jinshi Organic Preparations and Procedures International, 1995 , vol. 27, # 2 p. 224 - 228

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Citation Number: 9

Abstract

Paine et al! and containing 17%(molar ratio) of ethyl 3, 5-dimethylpyrrole-2-carboxylate based on'H NMR measurement) under nitrogen. The pyrrole was dissolved in a minimum amount of anhydrous ethanol (about 200 mL). Zinc dust (19.5 g, 0.30 mol) was added to the flask with vigorous stirring at room temperature. Then, conc. hydrochloric acid (37%, 70 mL) was dripped in rapidly. The reaction proceeded vigorously for 40-50 min (temperature ...

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