Magnesium for drying methanol

Magnesium for drying methanol, 41, 85 Maleanilic acid, 41, 93 conversion to N-phenylmaleimide, 41, 93... 

Detection Spraying with 5% magnesium chloride in methanol, air-drying, spraying with 0.3% V,2,6-trichlorobenzoquinoneimine (TCQ) in hexane, heating for 5-10 min at 110°C bright red-orange zone, 200 ng sensitivity. 

For preparation of a solution of magnesium methoxide, 1.21. of dry methanol (distilled from magnesium methoxide) is cooled with ice in a 2-1. flask fitted with a drying tube and four 3-g. batches of magnesium are allowed to react completely. 

Dry methanol Magnesium turnings (2.5 g) and iodine (0.1 g) are added to methanol (500 ml) and the mixture is heated under reflux for 1 hr. The dry methanol is then distilled into a clean dry flask and used for preparing methanolic HCl and for all other purposes as required. 

Baba et al. (1980b) attempted an asymmetric reduction by 1,4-di-hydropydidine covalently bound to a cyclic peptide, bacitracin, which is an antibiotics and has large affinity to the zinc ion. They intended to enhance the reactivity of 1,4-dihydropyridine by the coordination of a cyclic peptide moiety to a metal ion as well as to achieve the asymmetric reduction by an effect of the chiral field provided by the peptide. However, neither the activity nor the ability for asymmetric induction were so high. The optical yield of ethyl i -mandelate in the reduction of ethyl benzoylformate in the presence of magnesium perchlorate was 5.4 % (7 ) in dry methanol only 1.9 % (i ) in acetonitrile. 

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