title: Chelation-control in nucleophilic addition to Cr(CO)3-complexed aryl aldehydes.
abstract: One or more methoxy groups on the benzylic carbon at the ortho-position of tricarbonylchromium-complexed aryl aldehydes (2, 3 or 4) permit chelation-controlled addition of nucleophiles to the carbonyl function in the presence of Lewis acids. In the absence of a Lewis acid additive, a complementary set of diastereomeric products are obtained.
authors.affiliation: Division of Organic Chemistry (Synthesis), National Chemical Laboratory, Pune 411 008, India.
authors.forename: Suresh Kumar
authors.initials: SK
authors.lastname: Tipparaju
authors.forename: Vedavati G
authors.initials: VG
authors.lastname: Puranik
authors.forename: Amitabha
authors.initials: A
authors.lastname: Sarkar