01897nas a2200241   4500008004100000022001400041245011900055210006900174260009200243300001000335490000600345520098600351653002501337653002301362653002401385653001501409653001201424100002201436700002101458700002501479700002101504856013001525       2012                        eng d  a1751-825300aEnvironmentally benign synthesis of beta-hydroxy sulfides using cyclic carbonates catalyzed by large-pore zeolites0 aEnvironmentally benign synthesis of betahydroxy sulfides using c  a4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLANDbTAYLOR & FRANCIS LTDcAUG  a19-260 v53 a<p>An efficient one-pot synthesis of beta-hydroxy sulfides from thiophenol and cyclic carbonates catalyzed by large-pore zeolites has been reported. Reaction of thiophenol with ethylene carbonate in the presence of the Na-X zeolite catalyst gave the highest yield of 2-(phenylthio)ethanol (100%), while reaction with propylene carbonate a highest yield of regioselective product 1-(phenylthio)propan-2-ol was obtained (97%). Enantiomerically pure 1,2-propylene carbonate gave highly regioselective and stereospecific phenylthiopropanol, demonstrating that original chirality of propylene carbonate is retained. A plausible mechanism has been proposed for zeolite-catalyzed transformation involving a chemoselective nucleophilic attack of thiophenoloxide ion onto the less-substituted carbon of cyclic carbonate. The Na-X zeolite catalyst is recyclable and provides advantages of green chemistry approach to the synthesis of beta-hydroxy sulfides without the use of any solvent.</p>10abeta-hydroxy sulfide10aethylene carbonate10apropylene carbonate10athiophenol10azeolite1 aUpare, Pravin, P.1 aKinage, Anil, K.1 aShingote, Savita, K.1 aGupte, Sunil, P.  uhttps://library.ncl.res.in/content/environmentally-benign-synthesis-beta-hydroxy-sulfides-using-cyclic-carbonates-catalyzed-001936nas a2200241   4500008004100000022001400041245014800055210006900203260000800272490000700280520105400287653003201341653003001373653002501403653001201428653001501440100002101455700001901476700002101495700002401516700002801540856012601568       2024                        eng d  a2193-580700aMethanesulfonic acid-catalyzed friedel-crafts alkylation: towards sustainable synthesis of arylalkanes from donor-acceptor cyclopropane ketones0 aMethanesulfonic acidcatalyzed friedelcrafts alkylation towards s  cJUL0 v133 a<p>
	We present herein Br &amp; oslash;nsted acid-catalyzed Friedel-Crafts alkylation of phenols with Donor-Acceptor cyclopropane ketones. The presence of the 1,4-diphenyl butan-1-one and 1,3-diphenyl propane-1-one motifs in various naturally occurring biologically significant molecules inspired us to pursue the direct synthesis of these structural frameworks. Utilizing methanesulfonic acid (MeSO3H) as a catalyst, we achieved a more environmentally friendly and high-yielding synthesis, owing to its cost-effectiveness, biodegradability, transition-metal and additives free conditions. Furthermore, we have successfully extended our developed methodology to thiophenols, resulting in the production of sulfur-based butan-1-one derivatives in good yields. The presence of 1,4-diphenyl butan-1-one and 1,3-diphenyl propane-1-one motifs in various naturally occurring biologically significant molecules prompted us to develop a Br &amp; oslash;nsted acid-catalyzed Friedel-Crafts alkylation of phenols with Donor-Acceptor cyclopropane. image</p>
10adonor-acceptor cyclopropane10aFriedel-Crafts alkylation10amethanesulfonic acid10aPhenols10athiophenol1 aGoswami, Lakshmi1 aPaul, Sayantan1 aMamale, Ajay, G.1 aGonnade, Rajesh, G.1 aBhattacharya, Asish, K.  uhttps://library.ncl.res.in/content/methanesulfonic-acid-catalyzed-friedel-crafts-alkylation-towards-sustainable-synthesis