Aminohydroxylation and dihydroxylation of 4-aryl-1,2,5,6-tetrahydropyridines
摘要:
Substituted 3-amino-4-aryl-4-liydi-oxypiperidines and 4-aryl-3.4-dihvdroxypiperidiiies are synthesized in the modest overall yields starting from the regio- and stereoselective trans-aminohydroxylation and dihydroxylation of 4-aryl-1,15.6-tetrahydropyridines via CAN-mediated oxidative addition and hydrogenation. (c) 2006 Elsevier Ltd. All rights reserved.
The First Examples of Ring-Closing Olefin Metathesis of Vinyl Chlorides
摘要:
[GRAPHICS]Ring-closing metathesis (RCM) of olefinic vinyl chlorides can be effected by using the second generation Grubbs catalyst (10 mol %, PhH, 65degreesC) to produce a variety of carbocyclic and heterocyclic five-, six-, and seven-membered rings in excellent yields.