反応式
C1(C[O:8][CH2:9][C@H:10]2[O:30][C@H:29]([CH2:31][OH:32])[C@@H:20]([O:21]CC3C=CC=CC=3)[C@@H:11]2[O:12]CC2C=CC=CC=2)C=CC=CC=1>CO.C(O)(=O)C.[Pd]>[CH2:31]([OH:32])[C@H:29]1[O:30][C@H:10]([CH2:9][OH:8])[C@@H:11]([OH:12])[C@@H:20]1[OH:21]参加物
実験手順
In accordance with Flowchart E, 2,5-anhydro-3,4,6-tris-O-(phenylmethyl)-D-mannose 29 is reacted with lithium aluminum hydride in ether at reflux temperature under argon, giving 2,5-anhydro-1,3,4-tris-O-(phenylmethyl)-D-mannitol 38. Compound 38 is hydrogenated in methanol/acetic acid over palladium on carbon, giving 2,5-anhydro-D-mannitol 39, which is then reacted with diphenyl phosphorochloridate in pyridine at reduced temperature, giving the product of Formula I where R', R",R'" and R"" are phenyl, 2,5-anhydro-D-mannitol, 1,6-bis(diphenyl phosphate) 40. Compound 40 is hydrogenated in methanol over platinum oxide, giving the product of Formula I where R', R",R'" and R"" are hydrogen, 2,5-anhydro-D-mannitol, 1,6-bis(dihydrogen phosphate) 41. Compounds 40 and 41 are disclosed in Voll et al., Carbohydrate Research, 95, 145-154 (1981), but are prepared by a different process. Substituting other phosphorylating agents in the reaction from 39 to 40, as described in Flowchart A, will result in the corresponding tetraesters and mixed tetraesters. ##STR18##
出典と根拠
- ORDレコード
- ord-384d0a893dda486c9fb2d3d4a08eadd9
- 出典データセット
- uspto-grants-1990_11
- 特許番号
- US04968790
関連ノート
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