Studies towards the synthesis of obtusenyne. Synthesis of the hexahydrooxonin nucleus
摘要:
The advanced intermediate (the 2,3,4,7,8,9-hexahydrooxonin) 3 for the synthesis of the Laurencia oxonane natural product, obtusenyne 1 was prepared in 8 steps from the previously reported lactone 4. The key transformations were the stereoselective enolate hydroxylation of the lactone 4 and a hydroxyl-directed intramolecular hydrosilation of the enol ether 12.
作者:Jonathan W. Burton、Andrew B. Holmes、S. Y. Mak、Neil R. Curtis、Andrew N. Payne、Miles S. Congreve、Craig L. Francis
DOI:10.1055/s-2005-918470
日期:——
A synthesis of the halogenated medium-ring ether natural product (+)-obtusenyne is reported utilizing a Claisen rearrangement and an intramolecular hydrosilation as key steps.
An intramolecular hydrosilation approach to hexahydrooxonins related to obtusenyne. Effect of catalyst and conditions on stereoselectivity
作者:Neil R. Curtis、Andrew B. Holmes
DOI:10.1016/s0040-4039(00)92340-2
日期:1992.1
The intramolecular hydrosilation of the alpha-dialkysilyloxy enol ethers 3 and 5 followed by oxidative work-up resulted in the diastereoselective synthesis of either the hexahydrooxonin diol 7 or 8 according to the catalyst and conditions employed.