Triflates paUadium complexes

An enantioselechve [2-I-2-I-2] cycloaddition between two molecules of 7-methoxy-l-trimethylsilyl-2-naphthyl triflate (224) and one molecule of DMAD was achieved (Equation 12.55) [122]. This process was carried out in the presence of a chiral paUadium-BINAP complex, affording the 9,12-dimethoxypentahehcene 225 in 66% enantiomeric excess (ee), along with the regioisomers 226 and 227 in a 66% overall yield. 

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