Molybdenum(II)- and Tungsten(II)-Catalyzed Allylic Substitution
作者:Andrei V. Malkov、Ian R. Baxendale、Dalimil Dvořák、Darren J. Mansfield、Pavel Kočovský
DOI:10.1021/jo9821776
日期:1999.4.1
The molybdenum(II) complexes Mo(CO)(5)(OTf)(2) (7a), [Mo(CO)(4)Br(2)](2) (8a), their tungsten(II) congeners 7b and 8b, and bimetallic complex Mo(CO)(3)(MeCN)(2)(SnCl(3))Cl (9a) have been found to catalyze the C-C bond-forming allylic substitution with silyl enol ethers derived from beta-dicarbonyls (e.g., 16 + 30 --> 46) or from simple ketones (e.g., 16 + 32 --> 50), aldehydes, and esters as nucleophiles
作者:Andrei V. Malkov、Ian Baxendale、Darren J. Mansfield、Pavel Kočovsky
DOI:10.1016/s0040-4039(97)01052-6
日期:1997.7
The new Mo(II) triflate complex 5 has been found to catalyze the CC bond forming allylic substitution with silyl enolethers derived from β-dicarbonyls (e.g., 6 + 12 → 14) and from simple ketones (e.g., 6 + 13 → 16) as nucleophiles.
Certain substituted, 7-oxabicyclo[2.2.1]heptan-2-ols and -2-ones as
申请人:Shell Oil Company
公开号:US04554366A1
公开(公告)日:1985-11-19
Compounds of the formula ##STR1## wherein X is (--CR.sub.4 R.sub.4 --).sub.m in which m is 0 or 1; Y is (--CR.sub.5 R.sub.6 --).sub.n in which n is 0, 1 or 2; Z is (--CR.sub.7 R.sub.7 --).sub.p in which p is 1, 2 or 3; the sum of m+n+p is an integer of 2 to 5, inclusive; R.sub.2 and R.sub.3 each is H or alkyl, and the like; R.sub.1 is H or alkyl; and W is an unsaturated moiety, are useful as plant growth regulators and herbicides. Novel intermediates are also disclosed.
Compounds of the formula ##STR1## wherein X is (--CR.sub.4 R.sub.4 --).sub.m in which m is 0 or 1; Y is (--CR.sub.5 R.sub.6 --).sub.n in which n is 0, 1 or 2; Z is (--CR.sub.7 R.sub.7 --).sub.p in which p is 1, 2 or 3; the sum of m+n+p is an integer of 2 to 5, inclusive; R.sub.2 and R.sub.3 each is H or alkyl, and the like; R.sub.1 is H or alkyl; and W is an unsaturated moiety, are useful as plant growth regulators and herbicides.