5458-77-5Relevant articles and documents
Synthesis of silica-bound amylose by phosphorolytic elongation of immobilised maltoheptaosyl hydrazides
Breitinger, Hans-Georg
, p. 6127 - 6131 (2002)
Maltoheptaoside-alkoxysilane anchor molecules were synthesised by fusing aliphatic ω-Si(OEt3) hydrazide linkers with maltoheptaose. After immobilisation of the primers on porous silica, support-bound amylose was synthesised by phosphorolytic synthesis. The hydrazone linkage as a pre-formed cleavage site allowed removal and subsequent characterisation of immobilised amylose, which showed a broad molecular weight distribution. Under HPLC conditions, amylose assumed a non-helical conformation, making surface interactions and not complexation the primary separation mechanism.
Improved protocol toward 1,3,4-oxadiazole-2(3H)-thiones and scale-up synthesis in the presence of SDS as a micelle promoted catalyst
Yildirim, Ayhan
, p. 473 - 478 (2015/06/30)
Convenient procedure for in situ cyclization of hydrazinecarbodithioate potassium salts to 1,3,4-oxadiazole-2(3H)-thiones under normal phase micellar media catalysis promoted by sodium dodecyl sulfate (SDS) as an anionic surfactant is reported. The main advantage of this procedure is to provide shorter reaction time for the completion of cyclization; scale-up synthesis is possible and the oxadiazoles were obtained in high to excellent yields (87-100%), making the protocol an attractive alternative to the available methods.
Synthesis, stereochemistry and biological activity of some novel long alkyl chain substituted thiazolidin-4-ones and thiazan-4-one from 10-undecenoic acid hydrazide
Rahman, V.P. Mujeebur,Mukhtar, Sayeed,Ansari, Wajid Husain,Lemiere, Guy
, p. 173 - 184 (2007/10/03)
The synthesis of four novel compounds, (i) [(11-{[2-(3-nitrophenyl)-4-oxo- 1,3-thiazolidin-3-yl]amino}-11-oxoundecyl)sulfanyl]acetic acid (4), (ii) N-[5-methyl-2-(3-nitrophenyl)-4-oxo-1,3-thiazolidin-3-yl]undec-10-enamide (5), (iii) 2-[(11-{[5-methyl-2-(3-nitrophenyl)-4-oxo-1,3-thiazolidin-3-yl]amino}-11- oxoundecyl)sulfanyl]propanoic acid (6) and (iv) 3-[(11-{[2-(3-nitrophenyl)-4- oxo-1,3-thiazinan-3-yl]amino}-11-oxoundecenyl) sulfanyl]propanoic acid (8) from 10-undecenoic acid hydrazide (1) via m-nitrobenzaldehyde-10-undecenohydrazone (2) using mercaptoacetic acid in (i), 2-mercaptopropionic acid in (ii and iii) and 3-mercaptopropionic acid in (iv) is described. The uncyclized products, ({11-[(2E)-2-(3-nitrobenzylidene)hydrazino]-11-oxo-undecyl}sulfanyl)acetic acid (3) and 3-({11-[(2E)-2-(3-nitrobenzylidene)hydrazino]-11-oxoundecyl}sulfanyl) propanoic acid (7) are also obtained in (i) and (iv), respectively. The hydrazones (2), (3) and (7) exist in two conformers as synperiplanar and antiperiplanar. Structural assignment, stereochemistry and biological assays are discussed.