1: With n-butyllithium; 4,4'-di-tert-butylbiphenyl; lithium in tetrahydrofuran T=-78°C; Metallation; addition; 2: With water in tetrahydrofuran T=-78 - 20°C; Hydrolysis; 3: With toluene-4-sulfonic acid in benzene Cyclization; Heating;
参考文献
Pastor, Isidro M.; Yus, Miguel
Tetrahedron Letters, 2000 , vol. 41, # 28 p. 5335 - 5339
