@article {44045, title = {Synthesis and characterization of six-membered pincer nickelacycles and application in alkylation of benzothiazole}, journal = {Journal of Chemical Sciences}, volume = {129}, year = {2017}, month = {AUG}, pages = {1161-1169}, type = {Article}, abstract = {

Six-membered pincer nickelacycle complexes have been synthesized and employed for the catalytic C{\textendash}H bond alkylation of benzothiazole. The pincer nickelacycle, {κP, κC, κP- (2 - iPr 2POCH 2-C 6H 3- 6 -CH 2OP iPr 2)} NiBr , [(iPr4-POCCCOP)NiBr(2)] was synthesized by the reaction of 1,3 - iPr 2POCH 2-C 6H 4-CH 2OP iPr 2[(iPr4-POCCCOP)-H(1)] with (CH3CN)2NiBr2 in the presence of Et 3N via the C(2){\textendash}H activation on ligand 1. Treatment of [(iPr4-POCCCOP)NiBr](2) with AgOAc afforded the complex [(iPr 4-POCCCOP) Ni (OAc)] (3) in good yield. Both the complexes 2 and 3 were characterized by 1H , 13C and 31P -NMR spectral analysis. Further, the molecular structures of complexes 2 and 3 were established by X-ray crystallography. The complex 2 was found to be an active catalyst for the C{\textendash}H bond alkylation of benzothiazole with alkyl halides containing β{\textendash}hydrogen atoms. Graphical abstract: Synopsis. Six-membered pincer nickelacycles have been synthesized and structurally characterized, which show catalytic activity for the C{\textendash}H bond alkylation of benzothiazole with alkyl halides containing β{\textendash}hydrogen atoms.[Figure not available: see fulltext.].

}, keywords = {Active catalyst, Alkyl halides, Alkylation, Atoms, Benzothiazole, Benzothiazoles, Catalyst activity, Chemical activation, Crystallography, C{\textendash}H activation, Hydrogen atoms, Nickelacycles, Pincer complex, Pincer complexessix-membered nickelacycle, six-membered nickelacycle, Spectrum analysis, Synthesis (chemical), Synthesis and characterizations, X ray crystallography}, issn = {0974-3626}, doi = {10.1007/s12039-017-1338-7}, author = {Pandiri, H. and Sharma, D.M. and Gonnade, R.G. and Punji, B.} } @article {48179, title = {Potassium phosphate catalyzed highly efficient synthesis of structurally diverse thioethers at ambient temperature}, journal = {Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry}, volume = {61}, year = {2022}, month = {FEB}, pages = {154-158}, type = {Article}, abstract = {

Commercially available potassium phosphate has been demonstrated to be a highly efficient catalyst for the synthesis of thioethers employing two different routes viz. alkylation of thiols with alkyl/aralkyl halides and by Michael addition of thiols to conjugated alkenes.

}, keywords = {Alkyl halides, Potassium phosphate, thia-Michael reaction, thioethers, thiols}, issn = {0019-5103}, author = {Mitragotri, Satish D. and Kulkarni, Makarand A. and Desai, V. Uday and Wadagaonkar, Prakash P.} } @article {48059, title = {Rongalite as a sulfone source: sulfonylation of para-quinone methides and alkyl/allyl halides}, journal = {Chemistry-an Asian Journal}, volume = {17}, year = {2022}, month = {AUG}, pages = {e202200408}, type = {Article}, abstract = {

A one-pot three-component reaction using p-quinone methides, rongalite and alkyl/allyl halides has been described. The corresponding unsymmetrical sulfones were obtained in good yields under mild reaction conditions in the absence of any metal, base or any other additive.

}, keywords = {Alkyl halides, diaryl methine, p-Quinone methide, rongalite, sulfonylation}, issn = {1861-4728}, doi = {10.1002/asia.202200408}, author = {Kale, Someshwar B. and Jori, Popat K. and Das, Utpal} }