Stereocontrolled synthesis of highly functionalized cyclohexenes. A short synthesis of a chorismic acid precursor
作者:Gary H. Posner、Todd D. Nelson
DOI:10.1016/s0040-4020(01)85582-4
日期:——
allowing isolation of the structurally and stereochemically rich initial bicyclic adducts 8. These bicyclic adducts are shown to be useful building units as exemplified by a very short and high-yield preparation of a chorismic acid precursor.
Chiral induction in photochemical reactions. 10. The principle of isoinversion: a model of stereoselection developed from the diastereoselectivity of the Paterno-Buechi reaction
作者:Helmut Buschmann、Hans Dieter Scharf、Norbert Hoffmann、Martin Wolfgang Plath、Jan Runsink
DOI:10.1021/ja00196a048
日期:1989.7
Reaction de benzeneglyoxylates chiraux avec des olefines cycliques du type furanne ou dioxole-1,3ine-4, pour former des oxetannes diastereoisomeres
苯乙醛酸反应 chiraux avec des olenes cycliques du type furanne ou dioxole-1,3ine-4,浇注前脱氧杂环丁烷非对映异构体
Stereoselectivity in the Paternò-Büchi reaction of 2,2-diisopropyl-1,3-dioxol with methyl trimethylpyruvate
作者:Stefan Buhr、Axel G Griesbeck、Johann Lex、Jochen Mattay、Jochen Schröer
DOI:10.1016/0040-4039(95)02415-8
日期:1996.2
Photocycloaddition of 2,2-diisopropyl-1,3-dioxol (1) with methyltrimethylpyruvate (2c) leads to the bicyclic oxetane 3c in high (> 98%) diastereoisomeric excess. X-ray analysis of 3c revealed the endo-tert.-butyl configuration. Semiempirical calculations (AM1) indicate that kinetic product control exists which can be rationalized with spin-orbit coupling elements.