Simple and general synthesis of new 11H-11λ5-dibenzo[c,f][1,2,5]dithiaphosphepine derivatives
摘要:
Treatment at room temperature of benzothiadiphosphole 1 with bis-Grignard 2 gives intermediate A, which after 3 h gives intermediate A'. Subsequent addition of RMgX or sodium alcoholate and final treatment with S-8 and water affords the title compounds 5 in good yields. From the reaction mixture it is also possible to obtain the cyclic phosphine sulfide 6 or its dimeric form 7. (C) 2002 Elsevier Science Ltd. All rights reserved.