1: With caesium carbonate in ethanol 2: With Merryfield resin in N,N-dimethyl-formamide T=50°C; 72 h; 3: With di(n-butyl)tin oxide in chlorobenzene T=133°C; 18 h; Further stages. Further byproducts.;
参考文献
Journal of the Chemical Society. Perkin Transactions 1, , # 5 p. 629 - 637