| Literature DB >> 23106813 |
Roman A Valiulin1, Teresa M Arisco, Andrei G Kutateladze.
Abstract
Intramolecular photoinduced cyclizations are investigated in photoprecursors assembled in a modular fashion via a Diels-Alder reaction of acetylenic dienophiles with subsequent Michael additions of aromatic ketones to install a chromophore capable of initiating Paternò-Büchi cycloadditions or radical cyclization cascades. The protolytic oxametathesis in these systems allows for rapid access to novel polycyclic scaffolds decorated by formyl groups and carboxylates suitable for subsequent modifications. In conformationally constrained photoprecursors, a radical rearrangement takes place resulting in intramolecular 1,3-diradical cyclopentanation of the double bond.Entities:
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Year: 2012 PMID: 23106813 PMCID: PMC3587035 DOI: 10.1021/jo301909j
Source DB: PubMed Journal: J Org Chem ISSN: 0022-3263 Impact factor: 4.354