Asymmetric synthesis with .alpha.,.beta.-bis[(methoxymethyl)oxy] ketones. Enantioselective total synthesis of natural (+)-indolizidine 195B (bicyclic gephyrotoxin 195B) and (-)-pinidine and their enantiomers from a common chiral synthon
Asymmetric synthesis with .alpha.,.beta.-bis[(methoxymethyl)oxy] ketones. Enantioselective total synthesis of natural (+)-indolizidine 195B (bicyclic gephyrotoxin 195B) and (-)-pinidine and their enantiomers from a common chiral synthon
Asymmetric synthesis with .alpha.,.beta.-bis[(methoxymethyl)oxy] ketones. Enantioselective total synthesis of natural (+)-indolizidine 195B (bicyclic gephyrotoxin 195B) and (-)-pinidine and their enantiomers from a common chiral synthon