@article { ISI:000238162900006, title = {Non-catalytic pyrolysis of ethane to ethylene in the presence of CO2 with or without limited O-2}, journal = {Journal of Chemical Science}, volume = {118}, number = {3}, year = {2006}, month = {MAY}, pages = {261-267}, publisher = {INDIAN ACADEMY SCIENCES}, type = {Article}, address = {C V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIA}, abstract = {

Influence of the presence Of CO2, which is a mild oxidant, on the performance of the thermal cracking of ethane to ethylene in the absence or presence of limited O-2 at different temperatures (750-900 degrees C), space velocities (1500-9000 h(-1)) and CO2/C2H6 and O-2/C2H6 mole ratios (0-2.0 and 0-0.3 respectively) has been investigated. In both the presence and absence of limited 02, ethane conversion increases markedly because of the presence Of CO2, indicating its beneficial effect on the ethane to ethylene cracking. The increased ethane conversion is, however, not due to the oxidation of ethane to ethylene by CO2; the formation of carbon monoxide in the presence Of CO2 is found to be very small. It is most probably due to the activation of ethane in the presence Of CO2.

}, keywords = {ethane, ethane cracking in presence Of CO2, ethane cracking in presence of CO2 and limited O-2, Ethylene, thermal cracking of ethane}, issn = {0253-4134}, doi = {10.1007/BF02708286}, author = {Choudhary, Vasant R. and Mondal, Kartick C. and Mulla, Shafeek Abdul Rashid} } @article { ISI:000325950600094, title = {Novel and efficient synthesis of azaarene-substituted 3-hydroxy-2-oxindoles via sp(3) C-H functionalization of 2-methyl azaarenes and (2-azaaryl)methanes over a heterogeneous, reusable silica-supported dodecatungstophosphoric acid catalyst}, journal = {RSC Advances}, volume = {3}, number = {43}, year = {2013}, month = {AUG}, pages = {20281-20286}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A novel and efficient protocol has been developed for the synthesis of azaarene-substituted 3-hydroxy-2-oxindoles via sp(3) C-H functionalization of 2-methyl azaarenes and (2-azaaryl)methanes with isatin in good to excellent yield. This is the first example in which heterogeneous, reusable silica supported dodecatungstophosphoric acid (DTP/SiO2) catalyzed sp(3) C-H functionalization of 2-substituted azaarenes and (2-azaaryl)methanes.

}, issn = {2046-2069}, doi = {10.1039/c3ra43515f}, author = {Mulla, Shafeek Abdul Rashid and Pathan, Mohsinkhan Y. and Chavan, Santosh S.} } @article { ISI:000362436800028, title = {Novel one-pot multi-component synthesis of 3,3 {\textquoteleft}-disubstituted oxindole and spirooxindole scaffolds via Sn-catalyzed C(sp(3))-H functionalization of azaarenes by sequential Knoevenagel-Michael-cyclization reaction}, journal = {RSC Advances}, volume = {5}, number = {99}, year = {2015}, month = {SEP}, pages = {81103-81107}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Sn-catalyzed C(sp(3))-H bond functionalization of 2-methyl azaarenes/2-(azaaryl)methanes has been achieved for the first time in a one-pot multi-component reaction with isatin and active methylene compounds via tandem sequential Knoevenagel-Michael-intramolecular C-N cyclization. This strategy provides new cost-effective access to potent and biologically/medicinally important spirooxindoles/3,3{\textquoteright}-disubstituted 2-oxindoles in good to excellent yields.

}, issn = {2046-2069}, doi = {10.1039/c5ra16334j}, author = {Chavan, Santosh S. and Pathan, Mohsinkhan Y. and Thorat, Shridhar H. and Gonnade, Rajesh G. and Mulla, Shafeek Abdul Rashid} }