Boron fluoride promoted cleavage of acetals by organocopper reagents application to asymmetric synthesis
作者:J.F. Normant、A. Alexakis、A. Ghribi、P. Mangeney
DOI:10.1016/0040-4020(89)80078-x
日期:1989.1
BF3. Et2O, organocopper and cuprate reagents promote the substitution of one alkoxy group of an acetal. Under the same conditions, alkoxy tetrahydropyrans react selectively, by ring cleavage. Chiral cyclic acetals, having a C2 axis of symmetry are diastereoselectively cleaved. The method serves to synthesize chiral secondary alcohols, after the removal of the chiral auxiliary.
NORMANT, J. F.;ALEXAKIS, A.;GHRIBI, A.;MANGENEY, P., TETRAHEDRON, 45,(1989) N, C. 507-516
作者:NORMANT, J. F.、ALEXAKIS, A.、GHRIBI, A.、MANGENEY, P.
DOI:——
日期:——
GHRIBI, A.;ALEXAKIS, A.;NORMANT, J. F., TETRAHEDRON LETT., 1984, 25, N 29, 3075-3078
作者:GHRIBI, A.、ALEXAKIS, A.、NORMANT, J. F.
DOI:——
日期:——
Reactivity of RCu,BF3 and R2CuLi,BF3 towards the ether linkage. Epoxides, acetals and orthoformates
作者:A. Ghribi、A. Alexakis、J.F. Normant
DOI:10.1016/0040-4039(84)80011-8
日期:——
The association of BF3 to organocopper and cuprate reagents increases dramatically their reactivitytowardsepoxides. The same reagents cleave acetals to afford the product of substitution of one alkoxy group, whereas orthoformates lead to acetals under conditions where no further attack occurs.