Asymmetric synthesis using enantiomerically pure 2-(p-anisylsulfinyl)-2-cycloalkenones
作者:Gary H. Posner、Leah L. Frye、Martin Hulce
DOI:10.1016/s0040-4020(01)82425-x
日期:1984.1
Conjugateadditions of many organometallic reagents to 2-(p-anisylsulfinyl)-2-cycloalkenones, 2 proceed with much greater diastereoselectivity than additions to the corresponding 2-(p-tolylsulfinyl)-2-cycloalkenones, 7. Complexation of 2 with zinc dibromide followed by addition of various Grignard reagents lead, after reductive removal of the sulfoxide, to 3-substituted cycloalkanones of higher optical
Highly diastereoselective diels-alder reaction of optically active 2-p-tolylsulphinyl-2-cycloalkenones with cyclopentadiene
作者:I. Alonso、J.C. Carretero、J.L. Garcia Ruano
DOI:10.1016/s0040-4039(01)80676-6
日期:1989.1
The Diels-Alderreaction of (S)-2-p-tolylsulphinyl-2-cyclopentenone (and 2-cyclohexenone) with cyclopentadiene, catalized by AlCl3 and AlEtCl2, occurs at room temperature with complete facial diastereoselectivity, but with moderate endo-exo selectivity.