1963
DOI: 10.1002/cber.19630960235
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Über N‐α‐Halogenalkyl‐carbonsäureamide, VII Die Umsetzung Schiffscher Basen mit Carbonsäurehalogeniden

Abstract: Durch Umsetzung von Carbonskurechloriden und Benzyliden-methylamin werden N-a-Halogenalkyl-carbonsaureamide gewonnen, die durch Alkoholyse bei Gegenwart tertitirer Amine in N-a-Alkoxyalkyl-carbonsaureamide fibergefuhrt werden. -Die aus Benzyliden-methylamin und CarbonsHurebromiden entstehenden Additionsprodukte reagieren hingegen mit einer zweiten Molekel Schiffscher Base unter Bildung leicht hydrolysierbarer, mesorneriestabilisierter Immonium-Oxonium-Salze.

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Cited by 55 publications
(23 citation statements)
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“…Thiophene‐ and pyrrole‐fused imines 6 d and 6 e were also suitable substrates, as was benzylated imine 6 f , all forming the expected spirocycles 8 l / 9 l – 8 n / 9 n with generally good diastereoselectivity and in good yield. Acyclic imines, which are often avoided in related methods based on N‐ acyliminium ion chemistry due to their tendency to hydrolyse, are also well‐tolerated, with spirocyclic products 8 o / 9 o and 8 p / 9 p each isolated in good overall yields. The major diastereoisomer formed in each case was assigned based on 1 H NMR spectroscopy, and in the case of spirocycles 8 n and 8 o , confirmed by X‐ray crystallography (Scheme )…”
Section: Figurementioning
confidence: 99%
“…Thiophene‐ and pyrrole‐fused imines 6 d and 6 e were also suitable substrates, as was benzylated imine 6 f , all forming the expected spirocycles 8 l / 9 l – 8 n / 9 n with generally good diastereoselectivity and in good yield. Acyclic imines, which are often avoided in related methods based on N‐ acyliminium ion chemistry due to their tendency to hydrolyse, are also well‐tolerated, with spirocyclic products 8 o / 9 o and 8 p / 9 p each isolated in good overall yields. The major diastereoisomer formed in each case was assigned based on 1 H NMR spectroscopy, and in the case of spirocycles 8 n and 8 o , confirmed by X‐ray crystallography (Scheme )…”
Section: Figurementioning
confidence: 99%
“…NMR 6 (ppm) = 0,77, 1.05 (s, 6 H, CH3 an C-4'), 1,59 (s, 3 H, CH3), 2,OO-2,28 (m, 2 H, C-3'), 2,90 (m,2 H,3,62 (m,2 H,6,40 (OH,austauschb. ),7,62 (m,5 H,C6H5).…”
Section: -Phenyl-l-(4'4'-dimethyl-a I '-Pyrrolin-2'-yl)-propan-2-olmentioning
confidence: 99%
“…Die Reaktion fuhrt uber die N-a-Halogenalkyl-carbonsameamide (1) [4], die rnit Zinntetrachlorid die N-Methyl-Nacylbenzaldiminium-Salze (2) bilden. Phenylacetylen reagiert dann in einer 1.4-Addition unter Bildung von (3).…”
Section: N-substituierte 4 H-13-oxazinium-salzeunclassified