Synthesis of Ethyl 3‐(1‐Acetyl‐3‐phenyl‐4,5‐dihydro‐1
<i>H</i>
‐pyrazol‐4‐yl)‐2,2‐difluoropropanoate from
<i>N</i>
‐Allyl‐
<i>N</i>
′‐benzylideneacetohydrazide and Ethyl 2‐Bromo‐2,2‐difluoroacetate
A route for cyclization reaction of N-allyl-N′-benzylideneacetohydrazide and ethyl 2-bromo-2,2-difluoroacetate to synthesize 3-(1-acetyl-3-phenyl-4,5-dihydro-1H-pyrazol-4-yl)-2,2-difluoropropanoate has been developed. This methodology features mild reaction conditions and good functional group tolerance, providing a direct approach for the preparation of dihydropyrazoles.
Dynamics at the active site of N2-acetyl-N1-(4-fluorobenzyl)carbazoyl-.alpha.-chymotrypsin
作者:J. T. Gerig、S. J. Hammond
DOI:10.1021/ja00338a039
日期:1984.12
Photocatalytic Carbosulfonylation/Cyclization of <i>N</i>-Homoallyl and <i>N</i>-Allyl Aldehyde Hydrazones toward Sulfonylated Tetrahydropyridazines and Dihydropyrazoles
作者:Yechun Wu、Xian Wu、Lingli Liu、Jin-Tao Yu、Changduo Pan