Unexpected Hydroxyspirolactone Formation uponBaeyer-Villiger Oxidation of atrans-?-decalone (trans-octahydronaphthalen-1(2H)-one) and X-ray structure of the product
作者:F. W. Joachim Demnitz、Sabine Freiberger、Hans-Peter Weber
DOI:10.1002/hlca.19950780411
日期:1995.6.28
ne ( = trans-5,5,8a-trimethyl-octahydronaphthalen-1(2H)-one; 1), when treated with trifluoroperacetic acid, gave the unexpected hydroxyspirolactone 7-hydroxy-7,11,11-trimethyl-1-oxaspiro[5.5]undecan-2-one (6), in which the two new O-atoms were introduced in a 1,2-trans relationship. The structure of this compound was conclusively proven by X-ray crystallography. The process involves the intermediacy
反式-4,4,10-三甲基-9-癸酮(=反式-5,5,8a-三甲基-八氢萘-1(2 H)-one; 1),用三氟过氧乙酸处理后,得到意外的羟基螺内酯7-羟基-7,11,11-三甲基-1-氧杂螺[5.5]十一烷-2-酮(6),其中两个新的O原子以1,2-反式关系引入。该化合物的结构已通过X射线晶体学确证。该过程涉及7元内酯2的中间产物,这是预期的Baeyer - Villiger产物,也可以在0°C的受控条件下,在含有Na 2的缓冲介质中成功制备该产物。HPO 4。