Mannite

Pyrazolines Imidazoles Thiazoles Oxadiazoles 1 -Phenylpyrazoles Purines Dioxolanes Ox azolines 10% Cyanethylated mannite on Celite 545. 5% OV-17 on Chromosorb W, AW-DMCS (H.P.). Carbowax 4000, dioleate on firebrick, 190 °C. Silicone grease on Chromosorb P. Apiezon L on firebrick C-22, 220 °C. 15% Hallcomid M-18 on firebrick. Carbowax 20M on Gas-Chrom P. Ethyleneglycol succinate on Diatoport-S. 

Nitro-a-methyl-d-mannosite. See oMethyl-mannite Tetranitrate in this Vol... 

Manna sugar mannite D-mannitol 1,2,3,4,5,6-hexanehexol Description... 

Mannit 745 D- I-,4C- 224 3,4-Desoxy-D- 1,2 5,6-Bis-0-[isopropyliden]-3,4-dimercapto- 342 I,2 5,6-Bis-0-[isopropyliden]-3,4-trithiocar-bonato- 342 Sorburonsiiure l- -Calcium-Salz 317 T D-Talose 602... 

When a commercially available C2-symmetric l,4 3,6-dianhydro-D-mannite 29 is chosen as the backbone, reaction of this diol compound with chlorophos-phoric acid diaryl ester gives a series of phosphorate ligands 30. These were tested using the asymmetric hydrogenation of dimethyl itaconate as a model... 

Nitromannit wird durch Losen von Mannit in kalter konzentrierter Sal-petersaure und Ausfallen durch Zusatz von kalter konzentrierter Schwefelsaure hergestellt. Das Rohprodukt wird mit verdunnter Bi-karbonatlosung und danach mit Wasser gewaschen und aus hei em Alkohol umkristallisiert. 

Mannite, a sugar substance used as a laxative produced in Italy. 

Mannich reaction org chem Condensation of a primary or secondary amine or ammonia (usually as the hydrochloride) with formaldehyde and a compound containing at least one reactive hydrogen atom, for example, acetophenone. Also known as Mannich condensation reaction. man-ik re,ak-shon mannite See mannitol. ma,nlt ... 

Figure 8.23A shows a simplified Eh-pH diagram for the Mn-O-H system. Within the stability field of water, manganese occurs in three valence states (2+, 3 +, and 4+). Figure 8.23A shows the condensed phases relative to the three valence states as the hydroxide pyrochroite Mn(OH)2 (2+), multiple oxide haus-mannite Mu304 (2+, 3 + ), sesquioxide Mu203 (3 + ), and oxide pyrolusite Mn02 (4+). 

A few efficient bisphosphite ligands have been used for asymmetric hydrogenation of itaconates or a-dehydroamino acid derivatives. Reetz has developed a series of C2-symmetric bisphosphite ligands such as L14, which are based on the structure of 1,4 3,6-dianhydro-D-mannite [78]. The ligands exhibit excellent reactivity and enantioselectivity for the asymmetric hydrogenation of itaconates. 

Die Oxydation von 1,4-Anhydro-D-mannit (9) am Platinkontakt fiihrt zur Bildimg von Mesoweinsaure-mono-glykolsaureather (11), ohne daB eine Zwischenstufe nachgewiesen werden konnte. In analoger Weise entsteht bei der Oxydation von l,4-Anhydro-D,L-talit (12) D,L-Wein-saure-mono-glykolsaureather (14). 

Dianhydro-D-mannit (126), der zwei endo-standige OH-Gruppen enthalt, wird bei 50° C in 6 h nahezu quantitativ zu 1,4 3,6-Dianhydro-D-threo-2,5-hexodiulose (128) oxydiert. Das Monoketon,... 

Bei der katalytischen Oxydation von 2-Acetamido-2-desoxy-3,4 5,6-di-O-isopropyliden-D-mannit entsteht 2-Acetamido-2-desoxy-3,4 5,6-di-0-isopropyliden-D-mannose Das Produkt wurde nicht isoliert, son-dem nach Abspaltung der Isopropylidengruppen chromatographisch nachgewiesen. 

---