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Nitrogen bridgehead compounds part 12. The reaction of the ethyl 6-methyl-4--oxo-6,7,8,9-tetrahydro-4h-pyrido [1,2-a]pyrimidine-3-carboxylate with iminium chlorides.

✍ Scribed by István Hermecz; István Bitter; Ágnes Horváth; Gábor Tóth; Zoltán Mészáros

Publisher
Elsevier Science
Year
1979
Tongue
French
Weight
149 KB
Volume
20
Category
Article
ISSN
0040-4039

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3-(2-Chloro­ethyl)-2-methyl-4-oxo-6,7,8,
3-(2-Chloro­ethyl)-2-methyl-4-oxo-6,7,8,9-tetra­hydro-4H-pyrido[1,2-a]pyrimidin-1-ium chloride
✍ Ravikumar, Krishnan ;Sridhar, Balasubramanian 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 148 KB

In the title compound, C 11 H 16 ClN 2 O + ÁCl À , the chloroethyl side chain is in a synclinal conformation. The tetrahydropyridine ring adopts a half-chair conformation. The crystal structure is stabilized by intermolecular N-HÁ Á ÁCl hydrogen bonds.

Proton magnetic resonance studies of com
Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms: XXXII—The 1H n.m.r. spectra and stereochemistry of 4-aryl-1,6,7,11b-tetrahydro-2H,4H-[1,3]oxazino[4,3-a]isoquinoline, 4-aryl-1,2,6,7,12,12b-hexahydro-4H-[1,3]oxazino[3′,4′:1,2]pyrido[3,4-b]indole and of related systems
✍ Trevor A. Crabb; Jacqueline S. Mitchell 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 284 KB

## Abstract __cis__(4‐H,11b‐H)‐4‐Aryl‐1,6,7,11b‐tetrahydro‐2__H__,4__H__‐[1,3]oxazino [4,3‐__a__]isoquinoline and the related thiazino compound preferentially adopt in solution the O (or S) inside __cis__‐conformation in contrast to __cis__(1‐H,4a‐H)‐1‐arylperhydropyrido[1,2‐__c__][1,3]oxazine whic