Zobrazeno 1 - 10
of 45
pro vyhledávání: '"David Alker"'
Autor:
Laurence M. Harwood, David J. Watkin, Sarah M. Robertson, David Alker, C.Eleri Williams, Giles Hamblett
Publikováno v:
Tetrahedron. 54:6089-6098
Chiral stabilised azomethine ylids derived from the reaction of (5S)-5-phenylmorpholin-2-one (1) with aldehydes undergo efficient and highly diastereocontrolled cycloaddition with a second molecule of aldehyde to furnish products (2) which may be con
Publikováno v:
Tetrahedron Letters. 39:475-478
Chiral stabilized azomethine ylids derived from reaction of (5 S )-phenylmorpholin-2-one ( 1 ) with aromatic imines undergo efficient and highly diastereocontrolled cycloaddition with a second molecule of imine to furnish products which may be conver
Publikováno v:
Tetrahedron. 53:12671-12678
We describe the evolution of stable azomethine ylid precursors which avoid the need for an aldehyde in the ylid generation step. tert -Butyl carbamate derivative ( 16 ) demonstrates comparable efficiency to the standard method of ylid generation and
Publikováno v:
The Journal of Organic Chemistry. 61:903-908
The syntheses of the heptaamino acid-substituted β-cyclodextrins per-6-[(phenylalanyl)amino]-β-cyclodextrin (6), per-6-cysteinyl-β-cyclodextrin (7), as well as the per-2,3-dimethyl-per-6-cysteinyl-β-cyclodextrin (12) are described. The amino acid
Autor:
Andrew J. P. White, Rainer Königer, Valerie Denise Harding, David J. Williams, David Alker, Peter R. Ashton, J. Fraser Stoddart
Publikováno v:
Tetrahedron Letters. 35:9091-9094
An efficient synthesis of the title compound, per-6-bromo-per-2,3-dimethylβ-cyclodextrin, is described, giving access to a highly soluble cyclodextrin, which may be used for further chemical modification of β-cyclodextrin. Crystals of the target co
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 22
Autor:
David Alker, Peter E. Cross
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 23