Synthesis of homochiral 1,2-diols from (−)-fenchone and (+)-camphor
作者:A. García Martïnez、E. Teso Vilar、A.Garda Fraile、S. de la Moya Cerero、L.R. Subramanian
DOI:10.1016/0957-4166(94)80180-0
日期:1994.7
(+)-(1R,2S)-1,2-dihydroxy-7,7-dimethylnorbornane (3) and (−)-(1R,2R)-1,2-dihydroxy-3,3-dimethylnorbornane (12) have been obtained from (−)-fenchone and (+)-camphor.
A new convenient procedure for the preparation of enantiopure C10-S- and C10-Se-substituted camphor-derived sulfides and selenides
作者:Antonio Garcı́a Martı́nez、Enrique Teso Vilar、Amelia Garcı́a Fraile、Santiago de la Moya Cerero、Beatriz Lora Maroto
DOI:10.1016/s0040-4039(01)00924-8
日期:2001.7
The enantiospecific preparation of two novel C10-S(II)- and C10-Se(II)-substituted camphor derivatives (arylsulfide and arylselenide) from readily available camphor is described. The established three-step route constitutes a model procedure for the straightforward preparation of interesting enantiopure C10-S- and C10-Se-substituted camphor-derived chiral sources. The key-step of the described route
The reactions of saturated and unsaturated ketones with trichloroacetic anhydride both alone and in the presence of trichloroacetic and p-toluenesulphonic acids were studied.
单独和在三氯乙酸和对甲苯磺酸的存在下,研究了饱和和不饱和酮与三氯乙酸酐的反应。
Conclusive Evidence of the Trapping of Primary Ozonides
作者:Michael E. Jung、Pablo Davidov
DOI:10.1021/ol010005g
日期:2001.2.1
[reaction: see text] Anomalousozonolysis of strained bicyclic allylicalcohols yields alpha-hydroxymethyl ketones. The proposed mechanism involves an unusual trapping of the primary ozonide that undergoes a Grob-like fragmentation instead of dissociating into the Criegee intermediates.
Semipinacol rearrangement is a special type of Wagner–Meerwein rearrangement that involves carbocation 1,2-rearrangement to provide carbonyl compounds with an α-quaternary carbon center. It has been strategically used for natural product synthesis and construction of highly congested quaternary carbons. Herein, we report a safe and green protocol that uses oxone/halide and Fenton bromide to achieve
Semipinacol 重排是一种特殊类型的 Wagner–Meerwein 重排,它涉及碳阳离子 1,2-重排以提供具有 α-季碳中心的羰基化合物。它已被战略性地用于天然产物的合成和高度拥挤的季碳的构建。在此,我们报告了一种安全和绿色的协议,该协议使用 oxone/halide 和 Fenton bromide 来实现卤化 semipinacol 重排。该方法的关键特征是通过用 oxone 或 H 2 O 2氧化卤化物,绿色原位生成活性卤化物,它会产生一种无毒的副产品(硫酸钾或水)。无需使用特殊设备即可在室温下轻松操作(对空气和湿气不敏感),与以前的方法相比增加了额外的优势。