STEREOSELECTIVE SYNTHESIS OF A CHIRAL SYNTHON, 2,2,5-TRISUBSTITUTED TETRAHYDROPYRAN, BASED ON SIMULTANEOUS 1,3-ASYMMETRIC AND 1,6-ASYMMETRIC INDUCTION VIA NUCLEOPHILIC ACETAL CLEAVAGE REACTION OF THE BICYCLIC ACETAL - A TOTAL SYNTHESIS OF (-)-MALYNGOLIDE
N. Maezaki et al., STEREOSELECTIVE SYNTHESIS OF A CHIRAL SYNTHON, 2,2,5-TRISUBSTITUTED TETRAHYDROPYRAN, BASED ON SIMULTANEOUS 1,3-ASYMMETRIC AND 1,6-ASYMMETRIC INDUCTION VIA NUCLEOPHILIC ACETAL CLEAVAGE REACTION OF THE BICYCLIC ACETAL - A TOTAL SYNTHESIS OF (-)-MALYNGOLIDE, Chemical communications, (18), 1997, pp. 1755-1756
A chiral 2,2,5-trisubstituted tetrahydropyran is synthesised efficient
ly via facial and group selective nucleophilic acetal cleavage reactio
n of a bicyclic acetal, wherein simultaneous 1,3- and 1,6-asymmetric i
nduction from a sulfinyl chirality is accomplished with high diastereo
selectivity; this chiral synthon is successfully applied to a total sy
nthesis of(-)-malyngolide.