Substrate scope and stereocontrol in the Rh(II)-catalysed oxyamination of allylic carbamates
摘要:
Application of a modified Du Bois protocol for rhodium-stabilised nitrenoid generation to a variety of allylic carbamates results in 4-acetoxymethyl-1,3-oxazolidin-2-one derivatives with moderate to high levels of stereocontrol. (C) 2014 Elsevier Ltd. All rights reserved.
Substrate scope and stereocontrol in the Rh(II)-catalysed oxyamination of allylic carbamates
摘要:
Application of a modified Du Bois protocol for rhodium-stabilised nitrenoid generation to a variety of allylic carbamates results in 4-acetoxymethyl-1,3-oxazolidin-2-one derivatives with moderate to high levels of stereocontrol. (C) 2014 Elsevier Ltd. All rights reserved.
The Tethered Aminohydroxylation (TA) of Cyclic Allylic Carbamates
作者:Timothy J. Donohoe、Peter D. Johnson、Andrew Cowley、Martine Keenan
DOI:10.1021/ja0276117
日期:2002.11.1
The tethered aminohydroxylation of cyclic allylic carbamates is described using catalytic amounts of potassium osmate. The mechanism of reaction involves formation of an imido-osmium complex which adds intramolecularly to alkenes with complete control of both regio- and stereoselectivity: the formation of syn-aminodiol motifs is now straightforward using this chemistry. Proof of the mechanism was obtained with an X-ray crystal structure of an azaglycolate osmate ester intermediate.