Showing papers by "Vinod K. Singh published in 2001"
TL;DR: Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf) 2 and Sn(OTF) 2 as mentioned in this paper.
80 citations
TL;DR: In this paper, a variety of silyl and THP ethers were directly converted into the corresponding acetates using acetic anhydride in the presence of a catalytic amount of Cu(OTf)2 in CH2Cl2.
23 citations
TL;DR: In this paper, a variety of ketones undergo an allylation reaction with tetra-allyltin in the presence of a catalytic amount of Cu(OTf)2 or Sn(OTlf)2.
17 citations
TL;DR: Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf) 2 and Sn(OTF) 2.
Abstract: Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf) 2 and Sn(OTf) 2 . Cu(OTf) 2 was very efficient for alkylation, acylation, and benzoylation reactions. However, in case of sulfonylation reactions, Sn(OTf) 2 gave better results.
4 citations
TL;DR: In this paper, a (3R,4R)-O-isopropylidene-1,6-Hexanediol 1 has been synthesized from a readily available Dmannitol derivative in few steps.
2 citations
TL;DR: In this article, a variety of silyl and THP ethers were directly converted into the corresponding acetates using acetic anhydride in the presence of a catalytic amount of Cu(OTf)2 in CH2Cl2.
Abstract: A variety of silyl and THP ethers were directly converted into the corresponding acetates using acetic anhydride in the presence of a catalytic amount of Cu(OTf)2 in CH2Cl2. It was observed that MEM ethers could also be cleaved under the same conditions. The reaction was also studied with other Lewis acids.
1 citations
TL;DR: In this article, a (3R,4R)-O-isopropylidene-1,6-Hexanediol 1 has been synthesized from a readily available Dmannitol derivative in few steps.
Abstract: (3R,4R)-O-isopropylidene-1,6-Hexanediol 1 has been synthesized from a readily available D-mannitol derivative in few steps.
TL;DR: In this article, a variety of N-substituted aziridines have been opened with TMS azide in MeCN at rt in the absence of any Lewis acid.
Abstract: A variety of N-substituted aziridines have been opened with TMS azide in MeCN at rt in the absence of any Lewis acid. The reaction was extended to the synthesis of (R,R)- and (S,S)-1,2-diaminocyclohexane.