MEHTA, G.;PADMA, S.;KARRA, S. R.;GOPIDAS, K. R.;CYR, D. R.;DAS, P. K.;GEO+, J. ORG. CHEM., 54,(1989) N, C. 1342-1346
作者:MEHTA, G.、PADMA, S.、KARRA, S. R.、GOPIDAS, K. R.、CYR, D. R.、DAS, P. K.、GEO+
DOI:——
日期:——
(S<i>S</i>)-2-(<i>p</i>-Tolylsulfinyl)norborneno-<i>p</i>-benzoquinones: A New Type of Facially Perturbed Enantiopure Quinones
作者:M. Carmen Carreño、José L. García Ruano、Antonio Urbano、M. Isabel López-Solera
DOI:10.1021/jo9618942
日期:1997.2.1
The syntheses and asymmetric Diels-Alder reactions of (SS)-2-(p-tolylsulfinyl)norboreno-p-benzoquinones 10 and 11 with cyclopentadiene are reported. The cycloadditions allowed the highly stereoselective obtention of the four possible endo adducts 12-15, optically pure synthetic equivalents of norborneno-p-benzoquinone-cyclopentadiene bisadducts. The detailed study of the H-1-NMR spectra of the adducts pointed out the anisotropic effects exerted by the sulfinyl moiety on the spectroscopic behavior of these rigid systems. In all cases, the pi-facial selectivities were fully controlled by the sulfinyl group being possible to reverse the diastereoselection in thermal conditions and in the presence of ZnBr2. The stereoselective synthesis of the cage compound 5, precursor of garudane, was achieved from cycloadduct endo-syn-13.
Design of annulated, polyfunctional, [5]-prismane secologues
作者:Goverdhan Mehta、S.Hari Krishna Reddy
DOI:10.1016/s0040-4039(00)93515-9
日期:1991.9
Bis-norbornenobenzoquinones 1 and 2 have been conveniently elaborated to the novel nonacyclic compounds 6 and 11, respectively.
Steady-state and laser flash photolysis studies of norbornenobenzoquinones and their Diels-Alder adducts
作者:G. Mehta、S. Padma、S. R. Karra、K. R. Gopidas、D. R. Cyr、P. K. Das、M. V. George
DOI:10.1021/jo00267a021
日期:1989.3
Mehta, Goverdhan; Reddy, S. Hari Krishna, Angewandte Chemie, 1993, vol. 105, # 8, p. 1230 - 1232