D. Haag et al., Carbohydrate based IMDA/aldol strategy towards the densely functionalized trans-decalin subunit of azadirachtin, CHEM COMMUN, (23), 1998, pp. 2577-2578
L-Rhanmal is converted into an hex-2-en-4-ulo C-glycopyranoside in which pr
operly configured diastereomeric centers, asymmetric as well as geometric,
are developed in the pendant anomeric substitutent via a Claisen aldol addi
tion, and the resulting product proceeds via an IMDA reaction td provide a
highly functionalised terpene AB ring system.