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Synthesis 1989; 1989(11): 825-829
DOI: 10.1055/s-1989-27402
DOI: 10.1055/s-1989-27402
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© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher's consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.
Ring Cleavage of N-Acyl- and N-(Arylsulfonyl)histamines with Di-tert-butyl Dicarbonate. A One-Pot Synthesis of 4-Acylamino- and 4-Arylsulfonylamino-1,2-diaminobutanes
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Publikationsverlauf
Publikationsdatum:
02. Mai 2002 (online)
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The ring cleavage of N-aryl- and N-(arylsulfonyl)histamines with di-tert-butyl dicarbonate in aqueous acetonitrile containing KOAc provides a one-pot synthesis of 4-acylamino- or 4-arylsulfonylamino-1,2-bis(tert -butoxycarbonylamino)butanes. Removal of the Boc groups in these protected triamines with trifluoroacetic acid or dry HCl in MeOH, followed by alkylation with benzyl bromoacetate, and then hydrogenation leads to N 4-acyl-1,2,4-butanetriamine -N 1,N 1,N 2,N 2 -tetraacetic acids and the N 4-arylsulfonyl analogs, respectively.