67711-05-1Relevant articles and documents
Vinyltin acetals in terpenic and nor-terpenic synthesis
Launay, Valerie,Beaudet, Isabelle,Quintard, Jean-Paul
, p. 937 - 946 (2007/10/03)
Vinyltin acetals obtained by stannylmetallation of homopropargyl acetals with Bu3SnMgMe/CuCN (E configuration) or by titanation of the corresponding alkyltin acetals (Z configuration) have been proved to be efficient storable precursors for the stereoselective synthesis of terpenoids, under mild experimental conditions.Due to the presence of a nucleophilic centre (Csp2-Sn bond) and of a protected electrophilic centre, they are also useful intermediates for an iterative synthesis of retinal and nor-retinoids. - Keywords: vinyltin; acetal; vinyllithium; monoterpenoid; retinal; nor-retinoid
Preparation of (9Z, 11Z) - Vitamin A
Vogt, Peter,Schlageter, Markus,Widmer, Erich
, p. 4115 - 4116 (2007/10/02)
Starting from (7E,9Z)-C15-aldehyde 4, the syntheses of (9Z, 11Z)-vitamin A acetate and palmitate are reported. The construction strategy is based on treatment of 4 with Zn-PPh3/CBr4, addition of acetaldehyde followed by a
7-cis,9-cis,11-cis-retinal, all-cis-vitamin A, and 7-cis,9-cis,11-cis-12-fluororetinal. New geometric isomers of vitamin A and carotenoids. 12
Asato,Kini,Denny,Liu
, p. 2923 - 2924 (2007/10/02)
-