Synthese von ?-Acetyl-?-methylenpolyencarbons�ureestern
作者:Hartmut Laatsch、Alke Pudleiner
DOI:10.1002/prac.19943360806
日期:——
The alpha-methylenpolyene carboxylic acids 1 and 2 are highly active against Gram-positive bacteria. If this activity arises from an interference with the cell membranes, then an abrupt change in biological properties is to be expected with growing chain length of simple model compounds. To make these tests possible, we describe here the synthesis of a series of homologue esters of type 40. Their synthesis was achieved by Wittig reactions of polyene alpha,omega-dialdehydes 6 with acetyl-methylentriphenylphosphoran 5a and the protected carboxymethylmethylen triphenylphosphonium salt 8.
Ahmed, Fawzi R.; Toube, Trevor P., Journal of Chemical Research, Miniprint, 1986, # 12, p. 3601 - 3641
作者:Ahmed, Fawzi R.、Toube, Trevor P.
DOI:——
日期:——
Synthesis of the (9S,18R)-seco acid of the leukocyte adhesion inhibitor cyclamenol A
作者:Marc Nazaré、Herbert Waldmann
DOI:10.1016/s0040-4039(99)02135-8
日期:2000.1
Cyclamenol A is a naturally occurring inhibitor of leukocyte adhesion to endothelial cells. The (9S,18R) diastereomer of cyclamenol A seco acid was synthesized by employing Sonogashira couplings and olefination reactions as the key steps. (C) 2000 Elsevier Science Ltd. Air rights reserved.
ARJUNAN P.; SHYMASUNDAR N.; BERLIN K. D.; NAJJAR D.; ROCKLEY M. G., J. ORG. CHEM., 1981, 46, NO 3, 626-629
作者:ARJUNAN P.、 SHYMASUNDAR N.、 BERLIN K. D.、 NAJJAR D.、 ROCKLEY M. G.
DOI:——
日期:——
Methodology for the polyene and related antibiotics-versatile and practical access to bifunctional all-trans polyolefinic systems
作者:Stephen Hanessian、Maurizio Botta
DOI:10.1016/s0040-4039(00)95312-7
日期:1987.1
A method is described to assemble all-trans bifunctional polyolefinic chains based on the reaction of aldehydes with a trienic phosphorane developed by Vedejs and coworkers.