Reformatsky试剂叔丁氧基羰基甲基溴化锌可通过苯甲醛二甲基乙缩醛与甲磺酰胺,甲苯-4-磺酰胺,4-(甲氧基羰基)苯磺酰胺和磺酰胺缩合生成的N-磺酰亚胺类化合物,例如1a-1d,可提高收率。β-氨基酸2a–2d。对于2b和2c,N-脱保护以还原性(Na-萘;低产率)发生,或者对于磺酰胺衍生物2d以水解方式(回流吡啶水溶液;在叔丁酯酸水解后氨基酸3a的产率为76%)发生。蒽9-磺酰胺(6)很容易通过蒽的磺化和氯化得到,并与醛缩合[RCHO; R = PH,4-FC 6 H ^ 4,4-MeOC 6 H ^ 4,4-NCC 6 ħ 4,2-呋喃基,(ë) -苯乙烯基],例如在的TiCl存在4 / ET 3 N,到屈服亚胺7a-7f,在加入叔丁氧基羰基甲基溴化锌后,得到保护的氨基酸8a-8f;然而,8F环化到磺内酰胺9经由自发的分子内Diels-Alder反应。N-蒽-9-磺酰基的还原裂解
Intramolecular imine cross-coupling in dibenzylidine sulfamides: Synthesis of unsymmetrical 1,2-diaryl ethanediamines
作者:Sunil V. Pansare、Mahesh G. Malusare
DOI:10.1016/0040-4039(96)00406-6
日期:1996.4
Intramolecular reductive cross-coupling of unsymmetrical dibenzylidene sulfamides generates the corresponding cyclic sulfamides in good yield. These intermediates are readily converted to the free, unsymmetrical1,2-diarylethanediamines.
�ber die Umsetzung von Dibenzylidensulfamiden mit Aminen
作者:Max Knollm�ller、Paul Kosma
DOI:10.1007/bf00901828
日期:1981.4
Über Dialkylidensulfamide
作者:Max Knollmüller、Karl R. Reich
DOI:10.1007/bf00906222
日期:1975.9
Ziegler,E.; Ruef,W., Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1975, vol. 30, p. 951 - 953
作者:Ziegler,E.、Ruef,W.
DOI:——
日期:——
Bis-Sulfamyl Imines: Potent Substrates for Asymmetric Additions of Arylboroxines under Rhodium Catalysis
作者:Rosemary Crampton、Simon Woodward、Martin Fox
DOI:10.1002/adsc.201000838
日期:2011.4.18
Bis‐sulfamyl imines are shown to be potentially ideal substrates for rhodium‐catalysed asymmetricadditions of arylboron nucleophiles as they show: (i) near perfect enantioselectivities (11 examples, 98–99+% ee), (ii) good to excellent diastereoselectivities (10–32:1 rac:meso), and (iii) high functional group tolerance in removal of the low molecular weight protecting group via mild heating in aqueous