[PDF] Top 20 STUDIES DIRECTED TOWARDS THE SYNTHESIS OF 2,3- DIHYDROXYTRINERVITANES AND DEVELOPMENT OF NEW METHODOLOGIES

... stereoselective synthesis of the five and six member ring framework of the diterpene 2,3 dihydroxytrinervitanes with 19 carbon skeletons, where we used intramolecular Diels-Alder approach to contruct the ... See full document

... levels of COD removal of 72%, confirming that the pretreatment of common industrial effluent with photocatalytic method is beneficial. The data obtained using integrated treatment method is also complemented by GC ... See full document

... regioselective synthesis of -alkoxy alcohols and 1,2- ...the synthesis of -hydroxy ethers is the ring opening of epoxides with an appropriate alcohol under acid ... See full document

... The synthesis of compound 5 was started from the 5-hexene-1-ol 10, which was protected with 2,3-dihydro-2H-pyran, and then oxidized to corresponding epoxide ... See full document

... the synthesis of a new class of optically pure 4-substituted pyrazoles from 2-formyl glycals and ...3,4,6-tri-O-ethyl- 2-C-formyl- D-glucal with phenylhydrazine under microwave irradiation and ... See full document

... afforded 2-(D-glycero–1,2–dihydroxy ethyl) furan 62 in 85% ...into 2-(D-glycero-1,2-dihydroxy ethyl) furan derivatives using montmorillonite KSF as ... See full document

... Our initial attempts were based on an easily available L (+)- tartaric acid as starting material. Accordingly, L- (+)- tartaric acid was converted to dimethyl tartrate 7 in presence of catalytic sulfuric acid in methanol ... See full document

... the development of simple, convenient and cost-effective methods using inexpensive and recyclable solid acids for the synthesis of N-substituted pyrroles remains to be a challenging ...efficient ... See full document

... one-pot synthesis of a-aminophosphonates a-aminophosphonates are an important class of biologically active compounds and their synthesis has received an increasing amount of interest because of their ... See full document

... The synthesis of building block A started from commercially available piperonal ...piperonal 2 using m-chloroperoxybenzoic acid followed by base hydrolysis gave the phenol 3, which was protected as ... See full document

... acetonitrile (3:1) furnished corresponding iodo compound 34. The choro compound 33 when refluxed in sodium sand in ether gave corresponding secondary allylic alcohol 35, which is also obtained when the iodo ... See full document

... illustrated in (scheme 1). The synthesis begins with propargyl alcohol as starting material. Propargyl alcohol was protected as its THP ether using dihydropyran and catalytic amount of CSA in DCM to afford ether 9 ... See full document

... antibiotic family in several important ways. Firstly, it is doubly charged, and therefore highly selective for divalent ions. This property is in direct contrast to the monobasic chelating effects of other polyether ... See full document

... dichloromethane (DCM), and methanol (MeOH) were purchased from Fisher Scientific and distilled before use. All solvents were used under argon or nitrogen unless otherwise noted. Thin layer chromatography (TLC) 20 x 20 cm ... See full document

... Commercially available D(-)ribose was protected as its 2,3-O-isopropylidene derivative and the primary hydroxyl group was protected as tert-butyldimethylsilyl ether with TBDMSCl and imidazole in DCM. The resulting ... See full document

... quinoline in 93% yield (entry a, Table1). The reactions proceeded smoothly in ionic liquid without the need for any additional acid catalyst. In this reaction, ionic liquids play a dual role as solvent and catalyst. ... See full document

... aldehyde 2 was treated with sodium salt of bis(2,2,2-trifluroethyl)(methoxycarbonyl methyl) phosphonate at –78 o C for 1 h to afford the corresponding cis-olefinic ester 10 as the major isomer in 82 % isolated ... See full document

... corresponding 3-thiocyanato indole ...aniline, 2-chloro-3-methylaniline, N,N-dimethylaniline, N-ethyl aniline, 3-nitroaniline and 2,5-dichloroaniline with ammonium thiocyanate in the presence ... See full document

... resembled to those of diarrheic shellfish poisoning (DSP) but the major DSP toxins such as okadaic acid and dinophysistoxins are very low in the contaminated mussels. Extensive bioassays performed on azaspiracid have ... See full document

... the synthesis of highly complex compounds has gained increasing importance in the last ...substituents. 2 While there are numerous reactions involving C−C bond cleavage of cyclobutanes, this section will ... See full document