The Use of N-Ethyl-N'-Dimethylamincfropylcarbodiimide or Silicon Tetrachloride in Pyrrole Syntheses

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• This material is identical to that prepared with acetic anhydride/ethyl propiolate see ref. 2 for method IR nujol 3055, 2970, 2940, 1710, 1600, 1445, 1380, 1290, 1200, 1165, and 1055 cm-1; NMR [CDC13/TMS) δ 1.17 (t, J = 5Hz, 3H), 3.40 (s, 3H), 4.08 (q, J = 5Hz, 2H), 6.70 (s, 1H) and 7.33 (s, 10H). Ana., calcd for C20H19NO2: C, 78.66; H, 6.27; N, 4.59. Found: C, 78.79; H, 6.33; N, 4.50.
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