Stereocontrolled synthetic entries to homochiral hydroxylated norbornene derivatives. Formal synthesis of some carbocyclic nucleosides.
摘要:
Several homochiral hydroxylated norbornene derivatives have been synthesized from D-mannitol. Stereocontrolled Diels-Alder cycloadditions and stereospecific hydroxylations are key processes for the creation of the stereogenic centers in the target molecules. These compounds are real or potential precursors in the synthesis of carbocyclic nucleosides and related products.
Synthesis and Diels-Alder reactions of homochiral 2-sulfinylmaleates with cyclopentadiene
作者:Inés Alonso、M.Belén Cid、J.Carlos Carretero、José L. Garcia Ruano、Miguel A. Hoyos
DOI:10.1016/s0957-4166(00)80020-8
日期:1991.1
of 1 and some Lewis acid catalyzed Diels-Alder reactions of 2 show high facial and endo selectivities. The facial selectivity of dienophile 2 highly depends on the Lewis acid, whereas reactivity of 1 and 3 is very sensitive to the solvent. These sulfinylmaleates 1, 2 and 3 act as synthetic equivalents of chiral acetylenedicarboxylates in Diels-Alder reactions after basic elimination of the sulfinylic
Synthesis and Diels-Alder reactions of t-butyl and t-butyl, methyl (S)s-2-p-tolylsulfinylmaleates, chiral synthetic equivalents of monoalkyl and mixed dialkyl acetylenedicarboxylates
作者:Inés Alonso、J.Carlos Carretero、José L. García Ruano
DOI:10.1016/s0040-4039(00)92127-0
日期:1991.2
The reaction of t-butyl p-tolylsulfinylacetate with glyoxylic acid yielded maleate monoester 1, whose methylation afforded asymmetric diester 2. Conditions in which 1 and 2 react with cyclopentadiene exhibiting high facial and endo selectivities are reported.
Enantioselective synthesis of chiral polyfunctional cyclopentane derivatives: Epoxy esters, hydroxy esters, and hydroxy amino esters
作者:Miguel Díaz、Vicenç Branchadell、Antoni Oliva、Rosa M. Ortuño
DOI:10.1016/0040-4020(95)00745-t
日期:1995.10
blocks which have been used as versatile precursors to several enantiopure title compounds, these being molecules with a high functional density that bear, at least, four stereogenic centers in the cyclopentane ring and a quaternary stereocenter in the side-chain.
Stereocontrolled synthetic entries to homochiral hydroxylated norbornene derivatives. Formal synthesis of some carbocyclic nucleosides.
作者:Miguel Díaz、Javier Ibarzo、José M. Jiménez、Rosa M. Ortuño
DOI:10.1016/s0957-4166(00)80493-0
日期:1994.1
Several homochiral hydroxylated norbornene derivatives have been synthesized from D-mannitol. Stereocontrolled Diels-Alder cycloadditions and stereospecific hydroxylations are key processes for the creation of the stereogenic centers in the target molecules. These compounds are real or potential precursors in the synthesis of carbocyclic nucleosides and related products.