for the synthesis of 0-substituted cyanohydrins from aldehydes and ketones, in the absence of solvent, employing minimum amounts of the corresponding cyanides has been optimised. Aldehydes react more rapidly than ketones using triethylamine as catalyst offering in both cases almost quantitative yields of the corresponding O-trimethylsilyl, O-methoxycarbonyl, O-benzoyl and O-acetyl cyanohydrins.
Gold(III)-Catalyzed Cyanosilylation of Ketones and Aldehydes
作者:Insung Choi、Hee-Seung Lee、Woo Cho、Sung Kang、Amiya Medda、Jungkyu Lee
DOI:10.1055/s-2008-1032154
日期:2008.2
efficient catalyst for the cyanosilylation of various ketones and aldehydes. The reactions were complete within 30 minutes at room temperature in the presence of only one mol% gold(III) chloride, yielding the corresponding cyanohydrin trimethylsilyl ethers in very good yields. The isolated yields for the reactions of ketones were up to 98%, and the reactions of aldehydes gave 100% conversion, as monitored
A Convenient One-Pot Cyanosilylation of Aldehydes and Ketones Using Potassium or Sodium Cyanide Impregnated on Amberlite XAD Resin and Trimethylsilyl Chloride
作者:Kazuaki Sukata
DOI:10.1246/bcsj.60.3820
日期:1987.10
In the cyanosilylation of benzaldehyde, the combination of potassium or sodium cyanide impregnated on Amberlite XAD resin and trimethylsilyl chloride has been found to be a good one-pot cyanosilylation agent. Although acetonitrile is the best solvent, substantial yields of the product is obtained even in a nonpolar solvent or without any solvent. In the reaction with other aldehydes or ketones, this
Synthesis applications of aza-Cope rearrangements. 11. Carbon-carbon bond formation under mild conditions via tandem cationic aza-Cope rearrangement-Mannich reactions. A convenient synthesis of polysubstituted pyrrolidines
作者:Larry E. Overman、Masaaki Kakimoto、Mark E. Okazaki、G. Patrick Meier
DOI:10.1021/ja00360a013
日期:1983.10
Preparation des methoxy-2 (ou hydroxy-2) alcene-3ylamines de depart. Preparation d'acetyl-3 pyrrolidines par reaction de methoxy-2 (ou hydroxy-2) methyl-2 butene-3 ylamine avec des aldehydes et par transposition de methyl-5 vinyl-5 oxazolidines. Preparation de formyl-3 pyrrolidines
制备甲氧基-2(或羟基-2)alcene-3ylamines de 离开。制备 d'乙酰基-3 吡咯烷对甲氧基-2 (ou 羟基-2) 甲基-2 丁烯-3 基胺 avec des 醛和对位转位脱甲基-5 乙烯基-5 恶唑烷。deformyl-3 吡咯烷的制备
Preparation of 1,2 aminols from cyanohydrins viaN-diisobutylaluminium imines.