Solvent directed electrophilic iodination and phenylselenenylation of activated alkyl aryl ketones
作者:Barbara Panunzi、Lucia Rotiroti、Marco Tingoli
DOI:10.1016/j.tetlet.2003.10.037
日期:2003.12
A mixture of molecular iodine and phenyliodine(III) bis(trifluoroacetate) (BTI) in CH3CN (or CH3OH) iodinates the aromatic ring of some activated alkyl aryl ketones. A different outcome results if PhSeSePh is used instead of I2 in the presence of BTI. In CH3CN the aromatic phenylselenenylation is still observed while in CH3OH the formation of α-phenylseleno ketones occurs followed by the conversion
Unusual Tandem Oxidative C–C Bond Cleavage and Acetalization of Chalcone Epoxides in the Presence of Iodine in Methanol
作者:Shriniwas Samant、Balaso Jadhav
DOI:10.1055/s-0033-1339134
日期:——
of chalcone epoxides is observed where chalcone epoxides on heating with iodine in methanol leads to α,α-dimethoxyacetophenones, through C–C bondcleavage followed by acetalization of the formyl group. The process occurs through ring opening of the chalcone epoxide by methanol to form β-methoxy alcohol, cleavage of the C–C bond in the latter to form α-ketoaldehyde, and acetalization of the formyl group
An interrupted Heyns rearrangement approach for the regioselective synthesis of acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d3cc04144a
日期:——
An efficient and general method for the synthesis of 2- and 3-acylindoles has been achieved with high regioselectivity from o-acylanilines and α-hydroxycarbonyl or its equivalent. The strategy involves the intramolecular trapping of an in situ generated aminoenol intermediate and an interrupted Heyns rearrangement pathway, followed by aromatization or rearrangement/aromatization. Important features