Stereoselection in the reaction of acid halides and vinylogous urethanes
作者:Richard H. Schlessinger、James R. Tata、James P. Springer
DOI:10.1016/s0040-4039(00)96744-3
日期:1987.1
Acidhalides which carry either an α-phenyl or α-alkoxy residue show fascinatingly high and useful diastereoselection on condensation with the vinylogous urethane derived ketene acetal enamine 3. Optically active halides of this type undergo reaction with 3 accompanied by very high diastereofacial selectivity.
SCHLESSINGER, RICHARD H.;TATA, JAMES R.;SPRINGER, JAMES P., TETRAHEDRON LETT., 28,(1987) N 45, 5423-5426
作者:SCHLESSINGER, RICHARD H.、TATA, JAMES R.、SPRINGER, JAMES P.
DOI:——
日期:——
Biosynthesis of tetronasin: Part 6. Preparation of structural analogues of the diketide and triketide biosynthetic precursors to tetronasin
作者:Simon L. Less、Sandeep Handa、Karen Millburn、Peter F. Leadlay、Christopher J. Dutton、James Staunton
DOI:10.1016/0040-4039(96)00600-4
日期:1996.5
The preparation of three analogues of the putative diketidebiosyntheticprecursor (2) and eight analogues of the putative triketidebiosyntheticprecursor (3) of the acyl tetronic acid ionophore tetronasin, as N-acetylcysteamine thioesters (4), (5), (6), (12), (13), (14), (15), (22), (23), (24) and (25) is described. Five examples are 19F-labelled; a new, enantiospecific method for the creation of