62170-41-6Relevant articles and documents
Total synthesis of (-)-vertinolide. A general approach to chiral tetronic acids and butenolides from allylic alcohols
Wrobel,Ganem
, p. 3761 - 3764 (1983)
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Cobalt-catalyzed hydrohydrazination of dienes and enynes: Access to allylic and propargylic hydrazides
Waser, Jerome,Gonzalez-Gomez, Jose C.,Nambu, Hisanori,Huber, Pascal,Carreira, Erick M.
, p. 4249 - 4252 (2007/10/03)
(Chemical Equation Presented) The cobalt-catalyzed hydrohydrazination reaction of dienes and enynes is presented. Allylic and propargylic hydrazines were obtained in synthetically useful yields (allylic amines, 60-90%; propargylic amines, 47-83%) and good chemo- and regioselectivity.
A novel, selective, and efficient route to carotenoids and related natural products via Zr-catalyzed carboalumination and Pd- and Zn-catalyzed cross coupling.
Zeng,Negishi
, p. 719 - 722 (2007/10/03)
[structure: see text]. A highly efficient and stereoselective protocol for the syntheses of symmetrical and unsymmetrical carotenoids involving Zr-catalyzed carboalumination of conjugated oligoenynes and Pd- and Zn-catalyzed alkenyl-alkenyl coupling has been developed and applied to the syntheses of beta- and gamma-carotene and vitamin A. gamma-Carotene of > or =99% isomeric purity was prepared in three linear steps (five steps overall) from beta-ionone, enyne 8, (E)-ICH=CHBr, and (E)-Me3SiC triple bond CCH=CHBr in 32% overall yield.