1.
J Org Chem
; 74(15): 5584-9, 2009 Aug 07.
Article
in English
| MEDLINE
| ID: mdl-19572595
ABSTRACT
The total synthesis of pteridic acids A and B is reported. The convergent asymmetric synthesis involved the use of a diastereoselective ethyl ketone aldol reaction followed by an efficient spiroketalization and provided pteridic acids A and B in 2.9% and 2.8% overall yield, respectively.