Solvent, chelation and concentration effects on the benzannulation reaction of chromium carbene complexes and acetylenes
References (47)
- et al.
Tetrahedron Lett.
(1987)et al.J. Am. Chem. Soc.
(1986)J. Am. Chem. Soc.
(1985)et al.Tetrahedron
(1985)et al.Tetrahedron
(1985)et al.J. Am. Chem. Soc.
(1984)et al.J. Org. Chem.
(1984)et al.J. Am. Chem. Soc.
(1984)et al.Angew. Chem. Int. Ed. Engl.
(1983)et al.Chem. Ber.
(1982) J. Organomet. Chem.
(1977)- et al.
J. Am. Chem. Soc.
(1986) - et al.
Justus Liebigs Ann. Chem.
(1975) - et al.
Chem. Ber.
(1982)et al.Chem. Ber.
(1980) - et al.
J. Am. Chem. Soc.
(1981)et al.J. Am. Chem. Soc.
(1980) - et al.
Angew. Chem. Int. Ed. Engl.
(1982)et al.Chem. Ber.
(1980) - et al.
Organometallics
(1985) - et al.
Angew. Chem. Int. Ed. Engl.
(1982)et al.J. Am. Chem. Soc.
(1987) - et al.
J. Organomet. Chem.
(1984)
Angew. Chem. Int. Ed. Engl.
Tetrahedron
Angew. Chem. Int. Ed. Engl.
Prog. Inorg. Chem.
Tetrahedron Lett.
J. Organomet. Chem.
J. Am. Chem. Soc.
J. Organomet. Chem.
Tetrahedron Lett.
J. Am. Chem. Soc.
J. Am. Chem. Soc.
J. Organomet. Chem.
Tetrahedron Lett.
J. Organomet. Chem.
J. Organomet. Chem.
J. Am. Chem. Soc.
Tetrahedron
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Versatile and regioselective synthesis of polysubstituted and highly oxygenated phenols via Dötz reaction of α-alkoxyvinyl(ethoxy)carbene complexes with alkynes
2016, Journal of Organometallic ChemistryTowards aflatoxins: a formal synthesis of aflatoxin B2
2008, TetrahedronCitation Excerpt :Given that we now had access to multigram quantities of carbene complex 5 its benzannulation reaction with the oxygenated acetylene 28 could be attempted. The alkyne 28 was conveniently prepared from chloroacetaldehyde dimethyl acetal using a modification of the method reported by Raucher.27 Exposure of the acetal to LDA (3 equiv; −78 °C to rt, 4 h) followed by the addition of TBSCl (1 equiv) afforded the acetylene 28 in reproducible yields of 22% yield after Kügelrohr distillation.
Approaching ambient temperatures in 1,2-DCE to deliver efficient intermolecular Dötz benzannulation processes
2008, TetrahedronCitation Excerpt :This annulation, between an α,β-unsaturated Fischer carbene complex and an alkyne, has become an established synthetic technique for the preparation of highly functionalised phenols and quinones (Scheme 1).2,4 Such processes are normally performed by heating the substrates in an ethereal donor solvent,4,5 and high levels of regioselectivity, with respect to the alkyne insertion, are generally delivered.4,6 Having stated this, there are two common drawbacks associated with this type of reaction: only moderate yields of products often result, and long reaction times can be required.
A formal synthesis of aflatoxin B2: A Dötz benzannulation approach
2006, Tetrahedron Letters