Synthesis of novel pyrazolopyrrolopyrazines, potential analogs of sildenafil

M Kopp, JC Lancelot, P Dallemagne…

Index: Journal of Heterocyclic Chemistry, , vol. 38, # 5 p. 1045 - 1050

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Citation Number: 69

Abstract

... J. Heterocyclic Chem., 38, 1045 (2001). ... 1H NMR (400 MHz) were recorded on a JEOL Lambda 400 Spectrometer. Chemical shifts are expressed in parts per million downfield from tetramethylsi- lane as an internal standard. ... [13] A. Lapworth and AC Hann, J. Chem. ...