✦ LIBER ✦

The correct synthesis of 2,3-dihydro-2-aryl-4-r-[1]benzopyrano[4,3-c]pyrazole-3-ones.

✍ Scribed by Vittoria Colotta; Lucia Cecchi; Fabrizio Melani; Giovanna Palazzino; Guido Filacchioni

Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 192 KB
Volume: 28
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)95618-1

No coin nor oath required. For personal study only.

✦ Synopsis

The claimed synthesis of 2a from 2-methyl-3-chromonecarbonitrile is shown not to lead to%, as previously reported but to 1,4-dihydro-l-phenyl-3-methyl[l]benzopyrano~3,4-d]pyrazole-4-one IOa.

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