Enantioselective construction of highly functionalized bicyclo[4.3.0] system through Diels-Alder cycloaddition
摘要:
The Diels-Alder reaction of chiral 2-alkylsulfinyl-1-nitroalkene 4 with Danishefsky`s diene afforded adducts 9a and 10a in good chemical yield with a high enantiomeric excess, while diastereomeric nitroalkene 5 gave 9b and 10b, enantiomeric to 9a and 10a, respectively. The synthesis of the chiral dienophiles and mechanism of the chiral induction in the cycloaddition are discussed.
Enantioselective construction of highly functionalized bicyclo[4.3.0] system through Diels-Alder cycloaddition
摘要:
The Diels-Alder reaction of chiral 2-alkylsulfinyl-1-nitroalkene 4 with Danishefsky`s diene afforded adducts 9a and 10a in good chemical yield with a high enantiomeric excess, while diastereomeric nitroalkene 5 gave 9b and 10b, enantiomeric to 9a and 10a, respectively. The synthesis of the chiral dienophiles and mechanism of the chiral induction in the cycloaddition are discussed.