Mono- and disubstitutions of (hepta-2,5-diyne-1,7-diol) bis(dicobalt) derivatives Selectivity in Nicholas reactions
作者:Richard Guo、Romelo Gibe、James R Green
DOI:10.1139/v03-209
日期:2004.2.1
Bis(hexacarbonyldicobalt) complexes of benzyl ether methyl ether or benzyl ether acetate derivatives of hepta-2,5-diyne-1,7-diols undergo selective Lewis-acid-mediated Nicholas reactions with enol silanes, silylketeneacetals, and allylstannanes, preferentially replacing the methyl ether or acetate function. Hydride nucleophiles are similarly incorporated selectively using a benzyl ether alcohol