Dihydroquinolines have been synthesized and have been shown to be potent n-NOS inhibitors. Selectivity versus e-NOS was increased to approximately 100-fold through appropriate substitution at the benzene ring. (C) 2002 Elsevier Science Ltd. All rights reserved.
Tandem alkylation–cyclization process via an O,C-dianion
摘要:
A general protocol for preparing densely functionalized cyclopentenones through a tandem nucleophilic addition-deprotonation-alkylation-cyclization process is described. Addition of lithioallene 2 to enamides 1 generates tetrahedral intermediate 3. Deprotonation of the gamma carbon atom of the allene function in situ, followed by trapping by a suitable electrophile and cyclization during workup leads to C6 substituted cyclopentenones 6. (c) 2005 Elsevier Ltd. All rights reserved.
作者:Kei Kitamura、Naoyuki Shimada、Craig Stewart、Abdurrahman C. Atesin、Tülay A. Ateşin、Marcus A. Tius
DOI:10.1002/anie.201500881
日期:2015.5.18
A Pd0‐catalyzed asymmetric Nazarov‐type cyclization is described. The optimized ligand for the reaction incorporates a weakly coordinating pyridine ring into a TADDOL‐derived phosphoramidite (TADDOL=α,α,α,α‐tetraaryl‐1,3‐dioxolane‐4,5‐dimethanol). The reaction leads to the formation of cyclopentenones as single diastereoisomers that incorporate two contiguous asymmetric centers, one tertiary and one
Silicon in synthesis. 8. Vinyltrimethylsilane, a convenient ethylene equivalent for the synthesis of vinyl arylsulfides, vinyl arylsulfoxides, thiosilylketene acetals, and fused cyclopentenones
作者:Frank Cooke、Rudi Moerck、James Schwindeman、Philip Magnus
DOI:10.1021/jo01294a026
日期:1980.3
A convenient preparation of 4- and 5-substituted cyclopentenones: a short synthesis of methylenomycin B
作者:Carmelo J. Rizzo、Norma K. Dunlap、Amos B. Smith
DOI:10.1021/jo00232a043
日期:1987.11
Eckstein et al., Journal of the Chemical Society, 1959, p. 2941
作者:Eckstein et al.
DOI:——
日期:——
Chemistry of substituted [.alpha.-(carboethoxy)vinyl]cuprates and their synthetic application to cyclopentenone annulations