Diastereocontrol in the Synthesis of Models of Rings C and D of Phorbol: Directing Effect of an Ether Substituent on Lithium Carbenoid Mediated Cyclopropanation We thank Mr. A. W. Jahans for technical assistance. A.J.M.-S. thanks the Secretaria de Estado de Universidades, Investigacion y Desarrollo (SEUID; Spanish funding body) for a postdoctoral fellowship. R.S. thanks Astra-Zeneca for a research studentship
Angew Chem Int Ed Engl. 2001 Jun 18;40(12):2311-2313.