A Novel and Efficient Process to 13β-Ethyl-gon-4-ene-3,11,17-trione
摘要:
A novel synthetic process to 13 beta-ethyl-gon-4-ene-3,11,17-trione with the total yield of 44% starting from 13 beta-ethyl-17 beta-hydroxy-3-methoxy-gona-2,5(10)-diene was described.
A Novel and Efficient Process to 13β-Ethyl-gon-4-ene-3,11,17-trione
摘要:
A novel synthetic process to 13 beta-ethyl-gon-4-ene-3,11,17-trione with the total yield of 44% starting from 13 beta-ethyl-17 beta-hydroxy-3-methoxy-gona-2,5(10)-diene was described.
Regio and stereo selective hydrogenation of 17-Substituted 13β-ethyl-11β-hydroxy-gona-4,9-dien-3-ones and NMR study
作者:Li-Gong Liu、Tong Zhang、Zhen-Su Li
DOI:10.1016/0040-4020(96)00097-x
日期:1996.3
Selective hydrogenation of 17-Substituted 13β-ethyl-11β-hydroxy-gona-4,9-dien-3-ones (3a,b) in Pd(0)/SrCO3-pyridine media gives the corresponding 11β-hydroxy-gon-4-en-3-ones (4a,b). The complete assignments of 1H and 13C NMR spectra of the main products (4a,b) are made by one and two dimensional NMR techniques, such as J-MOD or ATP, 1H-1H COSY, HETCOR and COLOC, with the aid of the templates for recognition
在Pd(0)/ SrCO 3-吡啶介质中选择性取代17个13β-乙基-11β-羟基-gona-4,9-dien-3-ones(3a,b)得到相应的11β-羟基-gon- 4-en-3-ones(4a,b)。通过一维和二维NMR技术(例如J-MOD或ATP,1 H- 1 H COSY,HETCOR和COLOC )对主要产物(4a,b)的1 H和13 C NMR光谱进行完整分配。借助柯克及其同事提出的用于识别质子信号的模板。的取代基的影响10-CH 3,11β-OH和18-CH 3从模型化合物中总结了4-en-3-one类固醇中的,在实验和计算出的4a,b和15的碳13化学位移之间发现了良好的相关性。高的立体选择性是由于β侧取代基的空间位阻。还讨论了溶剂作用