Nickel/Cobalt‐Catalyzed Reductive Hydrocyanation of Alkynes with Formamide as the Cyano Source, Dehydrant, Reductant, and Solvent
作者:Jin Zhang、Cui‐Ping Luo、Luo Yang
DOI:10.1002/adsc.202000935
日期:2021.1.5
A Ni/Co co‐catalyzed reductive hydrocyanation of various alkynes was developed for the production of saturated nitriles. Hydrocyanic acid is generated in situ from safe and readily available formamide. Formamide played multiple roles as a cyanosource, dehydrant, and reductant for the NiII pre‐catalyst and vinyl nitriles, along with acting as the co‐solvent in this reaction. Detailed mechanistic investigation
Analogues of the potent histamine H-2 agonist arpromidine, characterized by non-heterocyclic groups (phenyl, cyclo-hexyl, alkyl) instead of the pheniramine-like portion, were prepared and tested for their H-2 agonistic and H-1 antagonistic activity in the isolated guinea pig right atrium and ileum, respectively. In the diphenylpropylguanidine series an increase in H-2 agonistic potency resulted from mono- or difluorination at one or both phenyl rings in the meta and/or para position (pD2 less-than-or-equal-to 7.75 vs pD2 = 7.15 for the unsubstituted parent compound). Compounds chlorinated at both phenyl rings were considerably less potent. Highest combined H-2 agonistic/H-1 antagonistic potency was found in the 4-fluorophenyl series. The arpromidine analogue with cyclohexyl and methyl group instead of phenyl and pyridine ring proved to be 30 times more potent than histamine in the atrium. The H-1 antagonistic potency in cyclohexyl compounds was lower than in the diaryl series. Thus, aromatic rings appear not to be required for high H-2 agonistic potency but are useful for combined H-2 agonistic/H-1 antagonistic activity.
Oxidative decyanation of benzyl and benzhydryl cyanides. A simplified procedure
作者:Stuart S. Kulp、Michael J. McGee
DOI:10.1021/jo00170a044
日期:1983.11
Reduction of .alpha.,.beta.-diarylacrylonitriles by sodium borohydride
作者:Stuart S. Kulp、Craig B. Caldwell
DOI:10.1021/jo01289a038
日期:1980.1
Amiel-Levy, Mazal; Hoz, Shmaryahu, Journal of the American Chemical Society, 2009, vol. 131, p. 8280 - 8284