Metal-Free Direct Asymmetric Aminoxylation of Aldehydes Catalyzed by a Binaphthyl-Based Chiral Amine
作者:Taichi Kano、Haruka Mii、Keiji Maruoka
DOI:10.1002/anie.201002965
日期:2010.9.3
And I'm free, metal‐free fallin': A metal‐free directasymmetricaminoxylation of aldehydes with the oxoammonium salt 1, generated in situ from TEMPO and benzoyl peroxide (BPO), was found to be catalyzed by a binaphthyl‐based secondary amine (S)‐2. This method provides a new approach to bench‐stable optically active α‐aminoxy aldehydes as useful chiral building blocks. TMS=trimethylsilyl.
Studies of Hydrogenolysis. LVII Catalytic Hydrogenation of Benzalacetophenone Oxide
作者:Akiko Sohma、Sekio Mitsui
DOI:10.1246/bcsj.43.448
日期:1970.2
catalysts and an additive, sodium hydroxide, on the catalytic hydrogenation of benzalacetophenone oxide (I) have been studied for the purpose of elucidating the selectivity of the catalysts on the hydrogenation. The catalytic hydrogenation over palladium or Raneynickel led to the formation of the hydroxyketones as the primary products resulting from the hydrogenolysis of the epoxide ring. 1,3-Diphenylpropane-1
Bonner; Raunio, Journal of Organic Chemistry, 1966, vol. 31, p. 291,294
作者:Bonner、Raunio
DOI:——
日期:——
NMR Studies of Three Types of Highly Coordinated Organotin Hydrides: Chemo-, Regio-, and Stereoselective Reduction of 2,3-Epoxy Ketones
作者:Takayo Kawakami、Ikuya Shibata、Akio Baba
DOI:10.1021/jo9512416
日期:1996.1.1
Three types of highly coordinated organotin hydrides, Bu(2)SnIH-Lewis base (Lewis bases; HMPA or tripiperidinophosphine oxide) (type A), Bu(2)SnFH-HMPA (type B), and Bu(3)SnH-Bu(4)NX (X = F, CN) (type C), were characterized as nucleophilic, chelation, and nonchelation types of reductants, respectively, in the reaction with 2,3-epoxy ketones 1. These reagents, which promoted a reduction of the epoxy ring and syn-selective and anti-selective carbonyl reduction, respectively, were spectroscopically confirmed with H-1, C-13, F-19, and Sn-119 NMR and FT-IR. Furthermore, the correlations between their structures and selective reducing abilities were discussed.