Synthetic Photochemistry. LX. One-pot Formation of Spirocyclic 3-Acetyl-2-hydroxy-2-cyclopentenone Derivatives from Methylenecycloalkanes and Methyl 2,4-Dioxopentanoate
of proto-photocycloadducts of methyl 2,4-dioxopentanoate to methylenecycloalkanes and -alkenes spontaneously caused retro-benzilic acid rearrangement in high yields. The results are utterly different from those of sterically-crowded acyclic alkenes, with which the rearrangement occurred by thermolysis as a minor process.
biologically active compounds. Although methods for the synthesis of thermodynamically favored, disubstituted cyclohexanes are well established, a reliable and modular protocol for the synthesis of their stereoisomers is still elusive. Herein, we report a general strategy for the modular synthesis of disubstituted cyclohexanes with excellent kinetic stereocontrol from readily accessible substituted methylenecyclohexanes
Dawson, Raymond M.; Godfrey, Ian M.; Hogg, Ronald W., Australian Journal of Chemistry, 1989, vol. 42, # 4, p. 561 - 580
作者:Dawson, Raymond M.、Godfrey, Ian M.、Hogg, Ronald W.、Knox, John R.
DOI:——
日期:——
JOHNSON, C. R.;ELLIOTT, R. C., J. AMER. CHEM. SOC., 1982, 104, N 25, 7041-7044
作者:JOHNSON, C. R.、ELLIOTT, R. C.
DOI:——
日期:——
Development of the First Menthane-Based Chiral Bis(π-allylpalladium) Catalysis: Asymmetric Allylation of Imines
作者:Rodney A. Fernandes、Dipali A. Chaudhari
DOI:10.1002/ejoc.201101588
日期:2012.4
A new ethylidene menthane-basedchiralπ-allylpalladium complex catalyzes the asymmetricallylation of various imines with allyltributylstannane and 1 equiv. of water to give chiral homoallylamines in good yields and enantioselectivities. The reaction was carried out essentially under neutral conditions and displayed a good transfer of chiral information from the menthane skeleton through the formation