Pseudopeptide synthesis of a pentaazamacrocycle containing two trans-fused cyclohexane rings
β Scribed by William L Neumann; Gary W. Franklin; Kirby R. Sample; Karl W. Aston; Randy H. Weiss; Dennis P. Riley; Nigam Rath
- Book ID
- 104256927
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 163 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The synthesis of a bis-cyclohexyl-fused penlaazamacrocycle via head-to-tail pseudopeptide cyclization chemistry is described. The bis-cyclohexyl-fused cyclic pseudopeptide 11 displays intramolecular hydrogen bonding which has been characterized by variable temperature NMR spectroscopy and X-Ray Crystallography.
π SIMILAR VOLUMES
Pyrazinoindoloquinone 6 was synthesized by alkylation of ethyl 4,7-dimethoxyindole-2-carboxylate (1), followed by cyclization of the N-bromoethyl derivative 2b in the presence of ammonia. Oxidative demethylation of 2b and of the oxopyrazinoindole 3 with silver(II) oxide furnished quinones 5b and 6.
## Abstract The synthesis, liquidβcrystal transition temperatures, and some physical properties of a variety of substituted phenyl ethers, most of which incorporate a lateral substituent, are reported. Many of the liquid crystals described exhibit nematic phases with negative dielectric anisotropy
## Abstract For Abstract see ChemInform Abstract in Full Text.