Syntheses of<i>N</i>-Substituted 3,3,4-Triaryl- and 3,3,4,4-Tetraphenyl-2-azetidinones
作者:Kailash Nath Mehrotra、Surendra Bahadur Singh
DOI:10.1246/bcsj.54.1838
日期:1981.6
The reactions of 2-diazo-1,2-diphenylethanone with Schiff’s bases Ar–CH=N–R gave new substituted 2-azetidinones together with 1,1′,4,4′-tetraphenyl-2,2′-azinodiethanone. 2-Diazo-1,2-diphenylethanone reacts with N-benzhydrylidene-N′-phenylurea to give 1-(phenylcarbamoyl)-3,3,4,4-tetraphenyl-2-azetidinone.
Catalytic Asymmetric γ‐Lactam Synthesis from Enolisable Anhydrides and Imines
作者:Aarón Gutiérrez Collar、Cristina Trujillo、Bruce Lockett‐Walters、Brendan Twamley、Stephen J. Connon
DOI:10.1002/chem.201901028
日期:2019.5.28
An anion‐binding approach to the problem of preparing enantioenriched γ‐lactams from enolisable anhydrides and imines is reported. A simple bisurea catalyst promotes the cycloaddition between α‐aryl succinic anhydrides and either PMP‐ or benzhydryl‐protected aldimines to provide γ‐lactams with two contiguous stereocentres (one quaternary) with complete diastereocontrol and high to excellent enantioselectivity
Ogata; Niinobe, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1936, vol. 56, p. 497,500
作者:Ogata、Niinobe
DOI:——
日期:——
Joshi, S. C.; Tikoo, P. K.; Mehrotra, K. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 11, p. 1009 - 1010
作者:Joshi, S. C.、Tikoo, P. K.、Mehrotra, K. N.
DOI:——
日期:——
Joshi, S. C.; Mehrotra, K. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 1, p. 68 - 69