A Novel Use of the Anions of Fischer-type Carbene Complexes as Alkenyl Metallic Species
作者:Kohei Fuchibe、Nobuharu Iwasawa
DOI:10.1016/s0040-4020(00)00205-2
日期:2000.7
The anions generated by deprotonation of Fischer-type carbene complexes or by 1,4-addition of lithium enolates to α,β-unsaturated complexes are found to act as alkenyl metallic species on iodine oxidation. Various α-methoxy-α,β-unsaturated esters are formed by the treatment of such anions with iodine in the presence of methanol and silver trifluoromethanesulfonate. In addition, alkylcerium reagents
发现通过费歇尔型卡宾配合物的去质子化或通过将烯酸锂1,4-加成到α,β-不饱和配合物而生成的阴离子在碘氧化中起烯基金属的作用。在甲醇和三氟甲磺酸银存在下,用碘处理这些阴离子可形成各种α-甲氧基-α,β-不饱和酯。另外,发现烷基铈试剂高效地经历α,β-不饱和卡宾配合物的1,4-加成。