Thiazole constrained analogues of the thevinones: synthesis and structure.
Magn Reson Chem
; 47(9): 801-7, 2009 Sep.
Article
em En
| MEDLINE
| ID: mdl-19431155
ABSTRACT
A simple synthesis of ring-constrained endoethenomorphinans possessing 2'-substituted thiazole ring 4-6 has been achieved by regio- and stereoselective Diels-Alder reaction of thiazolomorphinandienes 1-3 and methyl vinyl ketone in high yield (72, 64 and 87%, respectively). The structure of cycloaddition products was determined by high resolution mass spectrometry (HRMS), IR, 1D and 2D NMR techniques. Double-pulsed field gradient spin-echo-nOe and HMBC were found to be particularly powerful and indispensable tools in the exact structural elucidation of the presented new class of spatially constrained thevinones.
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MEDLINE
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En
Ano de publicação:
2009
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Article