Copper(I) catalysis of olefin photoreactions. 15. Synthesis of cyclobutanated butyrolactones via copper(I)-catalyzed intermolecular photocycloadditions of homoallyl vinyl or diallyl ethers
STEREOCHEMICAL STUDY ON THE REACTION OF COBALOXIME(I) WITH 2-SUBSTITUTED CYCLOHEXYL HALIDES. EVIDENCE FOR AN ELECTRON TRANSFER MECHANISM
作者:Masami Okabe、Masaru Tada
DOI:10.1246/cl.1980.831
日期:1980.7.5
Reaction of cobaloxime (I) , (CoI)−, with 2-hydroxy- (1a and 1b) and 2-alkoxycyclohexyl halides (1c–1h) gave 2-hydroxy- and 2-alkoxycyclohexyl cobaloximes (III) (2 and 3) . Stereochemistry of the organocobaloxime was independent of the configuration of the starting halides. 2-Allyloxycyclohexyl halides (6a and 6b) gave the organocobaloxime having 9-methyl-7-oxabicyclo[4,3,0]nonane moiety. These results
Radical cyclisations of dienes and enynes using phosphorus- and sulfur-centred radicals
作者:Julie E. Brumwell、Nigel S. Simpkins、Nicholas K. Terrett
DOI:10.1016/s0040-4020(01)89360-1
日期:1994.1
Reaction of a number of 1,6-diene or enyne systems with TolSO2SePh, under freeradical conditions, results in selenosulfonylation with concomitant CC bond formation, to give cyclised alkyl or vinylsulfones containing the synthetically useful phenylselenyl functionality. Similar cyclisations are possible by using Ph2PH in place of TolSO2SePh, resulting in the formation of cyclic phosphine or vinyl
Cyclisation of dienes using phosphorus-centred radicals to form organophosphorus adducts
作者:Christopher M. Jessop、Andrew F. Parsons、Anne Routledge、Derek Irvine
DOI:10.1016/s0040-4039(02)02610-2
日期:2003.1
Reaction of various dienes with phosphites or related phosphorus hydrides, under free radical cyclisation conditions, affords cyclic organophosphorus adducts. This quick, mild and technically clean approach affords 5- and 6-ring carbocycles and heterocycles in good to excellent yield.
Novel synthetic method for allylic amination of cyclic allylic ethers using chlorosulfonyl isocyanate
作者:Sang Hwi Lee、In Su Kim、Qing Ri Li、Guang Ri Dong、Young Hoon Jung
DOI:10.1016/j.tetlet.2011.02.036
日期:2011.4
The introduction of amines to allylic or benzylic position of cyclic compounds with chlorosulfonylisocyanate is developed in high to excellent yields. This method provides a novel access to biologically active compounds including the framework of 1-aminoindanes, 1-aminotetralines, and 1-amino-2-hydroxy cyclic compounds. Mechanistic evidence for the reaction pathway is also provided.
Stereoselective Isomerization of Unsymmetrical Diallyl Ethers to Allyl (<i>E</i>)-Vinyl Ethers by a Cationic Iridium Catalyst
作者:Yasunori Yamamoto、Ryou Fujikawa、Norio Miyaura
DOI:10.1080/00397910008086880
日期:2000.7
The stereoselective isomerization of unsymmetrical diallyl ethers to allyl (E)-vinyl ethers was carried out in the presence of a cationic iridium(I) catalyst. The catalyst prepared in situ by treating [Ir(cod)(PPh2Me)(2)]PF6 with hydrogen was found to be an excellent catalyst to selectively isomerize the less substituted allyl group to an (E)-vinyl ether.