First synthesis of optically active benzocyclobutene and biphenylene-based unusual α-amino acid derivatives
摘要:
Various optically pure benzocyclobutene and biphenylene-based alpha-amino acid derivatives are prepared in a very high diastereoselective manner via a six step sequence using Schollkopf chiral auxiliary. (C) 1999 Elsevier Science Ltd. All rights reserved.
First synthesis of optically active benzocyclobutene and biphenylene-based unusual α-amino acid derivatives
摘要:
Various optically pure benzocyclobutene and biphenylene-based alpha-amino acid derivatives are prepared in a very high diastereoselective manner via a six step sequence using Schollkopf chiral auxiliary. (C) 1999 Elsevier Science Ltd. All rights reserved.
Conversion of Primary Alcohols and Butadiene to Branched Ketones via Merged Transfer Hydrogenative Carbonyl Addition–Redox Isomerization Catalyzed by Rhodium
作者:Brian J. Spinello、Jessica Wu、Yoon Cho、Michael J. Krische
DOI:10.1021/jacs.1c07230
日期:2021.9.1
The first examples of rhodium-catalyzed carbonyl addition via hydrogen autotransfer are described, as illustrated in tandem butadiene-mediated carbonyl addition–redox isomerizations that directly convert primary alcohols to isobutyl ketones. Related reductive coupling–redox isomerizations of aldehyde reactants mediated by sodium formate also are reported. A double-labeling crossover experiment reveals
We developed here a Pd/C-catalyzed diastereoselective cis-hydrogenation of benzocyclobutene derivatives under mild conditions to deliver an array of bicyclo[4.2.0]octane scaffolds with up to five stereocenters. The π-bond localization enabled hydrogenation of the arene moiety to occur even at roomtemperatureunder1atm of a H2 atmosphere.
Kotha, Sambasivarao; Halder, Somnath, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2003, vol. 42, # 4, p. 863 - 872
作者:Kotha, Sambasivarao、Halder, Somnath
DOI:——
日期:——
One-step synthesis of benzocyclobutenes involving cooligomerization of linear mono- and diacetylenes catalyzed by .eta.5-cyclopentadienylcobalt dicarbonyl