Udai S. Gill

A new method for indole functionalization. Nucleophilic displacement reactions of [η6-(4- or 5-chloroindole)](η5-cyclopentadienyl)ruthenium(II) hexafluorophosphates

New cyclopentadienylruthenium complexes of 4- or 5-chloroindole prepared by a thermal substitution reaction of (cyclopentadienyltrisacetonitrile)ruthenium with 4- or 5-chloroindole undergo smooth nucleophilic aromatic substitution with various nucleophiles.

Reactions of n 6-o-Dichlorobenzene-n 5-cyclopentadienyliron Cation with Anions from Nitroalkanes

Abstract Treatment of the n6-o-dichlorobenzene-n 5-cyclopentadienyliron hexafluorophosphate with 3 molar equivalent of K2CO3 in nitroethane or nitromethane gives corresponding o-ClC,6H4 CH(R)NO2 FeCp+PF6 − (R = CH3 or H) complexes in excellent yields.

Novel cyclopentadienyl ruthenium(II) complexes of biologically important compounds

New cyclopentadienyl ruthenium complexes of tryptophol, N-acetyltryptamine, N-acetyl-L-tryptophan ethyl ester, N-acetyl-L-phenylalanine ethyl ester, and N-acetyl-L tyrosine ethyl ester were prepared by thermal ligand exchange reaction between cyclopentadienyl-tris(acetonitrile)ruthenium hexafluorophosphate and the substrate in 60–80% yields.

Ring Opening Reactions of n6-Xanthone-n5-Cyclopentadienyliron Hexafluorophosphate. A Novel Route to 0, 0′ Disubstituted Benzophenones

Abstract It has been known for some time that 9-xanthone with nitro substituents at the C-2 and C-7 positions are susceptible to the cleavage at the ether linkage by nucleophiles.1 However, this route for the synthesis of 0, 0′-disubstituted benzophenones has not been explored because of the need to introduce and remove the activating nitro groups. These observations clearly indicate the necessity of developing a method for making 0, 0′-disubstituted benzophenones. The present paper describes the photolysis of the CpFe+ complexes of 0, 0′-disubstituted benzophenones as a straightforward approach to the synthesis of 0, 0′-disubstituted benzophenones.

Hypervalent iodine oxidation of chromium tricarbonyl complexes of benzocycloalkanones and acetophenone

Hypervalent iodine oxidation of the title compounds occurs stereoselectively and regiospecifically to yield the Cr(CO)3 complex of the derived α-hydroxy dimethyl acetal.