beta-Maltose → beta-Maltose

HRID 1288660Notes

Reaction equation

HRID 1288660 reaction equation
[CH2:1]([OH:23])[C@H:2]1[O:7][C@H:6]([O:8][C@H:9]2[C@H:14]([OH:15])[C@@H:13]([OH:16])[C@H:12]([OH:17])[O:11][C@@H:10]2[CH2:18][OH:19])[C@H:5]([OH:20])[C@@H:4]([OH:21])[C@@H:3]1[OH:22]>O>[CH2:1]([OH:23])[C@H:2]1[O:7][C@H:6]([O:8][C@H:9]2[C@H:14]([OH:15])[C@@H:13]([OH:16])[C@H:12]([OH:17])[O:11][C@@H:10]2[CH2:18][OH:19])[C@H:5]([OH:20])[C@@H:4]([OH:21])[C@@H:3]1[OH:22].[CH2:1]([OH:23])[C@H:2]1[O:7][C@H:6]([O:8][C@H:9]2[C@H:14]([OH:15])[C@@H:13]([OH:16])[C@H:12]([OH:17])[O:11][C@@H:10]2[CH2:18][OH:19])[C@H:5]([OH:20])[C@@H:4]([OH:21])[C@@H:3]1[OH:22].[CH2:5]([OH:20])[C@H:6]1[O:7][C@H:9]([O:8][C@H:6]2[O:7][C@H:2]([CH2:1][OH:23])[C@@H:3]([OH:22])[C@H:4]([OH:21])[C@H:5]2[OH:20])[C@H:14]([OH:15])[C@@H:13]([OH:16])[C@@H:12]1[OH:17]

Participants

4

Reactant 1

HCID 6255beta-Maltose

Product 2

HCID 6255beta-MaltoseHCID 67189167HCID 67189167, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Ten parts by weight of maltose commercialized by Hayashibara Biochemical Laboratories, Inc., Okayama, Japan, was dissolved in 40 parts by weight of water, added at 35° C. and pH7.0 with 2 units/g maltose solid of a purified maltose/trehalose conversion enzyme obtained by the method in Experiment 10, reacted for 48 hours and reacted at 100° C. for 10 minutes to enzyme. The resultant solution contained about 69% trehalose on dry solid basis. The solution was decolored with activated carbon, deionized and purified with ion exchanges of H- and OH-forms, concentrated to about 78%, added with 0.1% crystalline trehalose hydrate as seed crystal on dry solid basis and allowed to standing at ambient temperature overnight to effect crystallization. The resultant massecuite was separated and the crystals were sprayed with a minimum amount of water for washing, thus obtaining about 2.3 parts by weight of an extremely pure crystalline trehalose hydrate, purity of 99.7%.

Workup

  1. additionadded at 35° C.

Sources & evidence

ORD record
ord-66f8672d83584072b5b6e46e049000b4
Source dataset
uspto-grants-1998_05
Patent number
US05747300

Reaction notes

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