| Literature DB >> 10836037 |
Abstract
[formula: see text] A solvent-dependent stereoselectivity found for intramolecular [4 + 4] photocycloaddition of tethered 2-pyridones is concentration dependent, indicating that a dimeric structure with four hydrogen bonds plays a critical role in the observed cis selectivity found for nonpolar solvents.Entities:
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Year: 1999 PMID: 10836037 DOI: 10.1021/ol991058p
Source DB: PubMed Journal: Org Lett ISSN: 1523-7052 Impact factor: 6.005