Ring Cleavage ofN-Acyl- andN-(Arylsulfonyl)histamines with Di-tert-butyl Dicarbonate. A One-Pot Synthesis of 4-Acylamino- and 4-Arylsulfonylamino-1,2-diaminobutanes
Bamberger ring-cleavage acylation of N-tosylhistamine with di-t-butylpyrocarbonate [ButOC(:O)–O–C(:O)OBut] in acetonitrile–aqueous potassium acetate leads to 3,4-bis(di-t-butoxycarbonylamino)but-3-enyl(tosyl)amine, which, after hydrogenation and treatment with hydrochloric acid, gives 1,2-diamino-4-tosylaminobutane dihyrochloride.
N-甲苯磺酰基组胺与焦碳酸二叔丁酯[Bu t OC(:O)–OC–C(:O)OBu t ]的Bamberger环裂解酰化反应生成3,4-bis(di -叔丁氧羰基氨基)丁-3-烯基(甲苯磺酰基)胺,在氢化和用盐酸处理后,得到1,2-二氨基-4-甲苯磺酰基氨基丁烷二氯化物。