ENNIS, DAVID S.;GILCHRIST, THOMAS L., TETRAHEDRON., 46,(1990) N, C. 2623-2632
作者:ENNIS, DAVID S.、GILCHRIST, THOMAS L.
DOI:——
日期:——
Synthesis of 3-substituted furans by directed lithiation and palladium catalysed coupling
作者:David S. Ennis、Thomas L. Gilchrist
DOI:10.1016/s0040-4020(01)82041-x
日期:1990.1
The 5-position of the furan ring of 4,4-dimethyl-2-(2-furyl)oxazoline (1a) was protected by a trimethylsityl group. The product, compound (2a), was then lithiated at the 3-position with sec-butyllithium and converted to the bromozinc species (2d) with zinc bromide. Coupling reactions with a range cf aryl-, acyl-, and vinyl halides were performed with Pd(PPh3)4 as catalyst. The reaction with (l-bromoethenyl)-