01183nas a2200169   4500008004100000022001400041245014700055210006900202260007100271300001400342490000700356520044800363100001900811700003100830700002200861856013000883       2012                        eng d  a1523-706000aOrganocatalytic sequential alpha-amination/corey-chaykovsky reaction of aldehydes: a high yield synthesis of 4-hydroxypyrazolidine derivatives0 aOrganocatalytic sequential alphaaminationcoreychaykovsky reactio  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a2468-24710 v143 a<p>A tandem reaction of in situ generated a-amino aldehydes with dimethyloxosulfonium methylide under Corey-Chaykovsky reaction conditions proceeds efficiently to give 4-hydroxypyrazolidine derivatives in high yields with excellent enantio- and diastereoselectivities. This organocatalytic sequential method provides for the efficient synthesis of anti-1,2-aminoalcohols, structural subunits present in several bioactive molecules as well.</p>1 aKumar, Senthil1 aVenkataramasubramanian, V.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/organocatalytic-sequential-alpha-aminationcorey-chaykovsky-reaction-aldehydes-high-yield-001204nas a2200229   4500008004100000022001400041245008100055210006900136260007500205300001100280490000700291520042000298653001900718653002200737653001600759653001300775653001400788100002300802700001900825700002200844856010800866       2014                        eng d  a0936-521400aOne-pot synthesis of cyclic carbonates from aldehydes, sulfur ylide, and CO20 aOnepot synthesis of cyclic carbonates from aldehydes sulfur ylid  aRUDIGERSTR 14, D-70469 STUTTGART, GERMANYbGEORG THIEME VERLAG KGcJAN  a97-1010 v253 a<p>Treatment of aldehydes with sulfur ylide (CH2=SOMe2 or CH2=SMe2), in the presence of CO2 (1 atm) bubbled sequentially under mild conditions, produces cyclic carbonates in preparative yields. Sodium iodide formed in situ promotes the reaction between epoxide as intermediate and CO2 at ambient conditions, thus constituting a powerful metal-free synthesis of organic cyclic carbonates directly from aldehydes.</p>10aCarbon dioxide10acyclic carbonates10acyclization10aepoxides10aInsertion1 aAher, Ravindra, D.1 aKumar, Senthil1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/one-pot-synthesis-cyclic-carbonates-aldehydes-sulfur-ylide-and-co2-0