Synthesis of Lamellarin D (35)a
a Reagents and conditions: (i) (1) 85, NaH, DMF, (2) PdCl2(pph3)2, PPh3, K2CO3; (ii) NBS, THF; (iii) 88, Pd(PPh3)4, Na2CO3, DMF; (iv) i-PrBr, K2CO3, DMF; (v) NBS, THF; (vi) 92, Pd(PPh3)4, K3PO4, DMF; (vii) DDQ, CHCl3, MW; (viii) AlCl3, CH2Cl2; (ix) NaH, THF. (Reprinted with permission from ref 32. Copyright 2005 American Chemical Society.)