申请人:NIPPON FINE CHEMICAL CO., LTD.
公开号:EP0263027A1
公开(公告)日:1988-04-06
Disclosed are a glycosidation catalyst comprising at least one of heteropoly acids represented by the formula
H aX pM qO r·bH₂O
wherein X is P, As, Si or Ge, M is at least one species selected from the group consisting of Mo, W and V, a is 3 4 or 6, b is an integer of 0 to 30, p is 1 or 2, q is 12 or 18, and r is 40 or 62, with the proviso that when X is P or As, a is 3 or 6; when X is Si or Ge, a is 4; and further (1) when X is P or As and a is 3, or when X is Si or Ge and a is 4, M is at least one species selected from the group consisting of Mo, W and V, p is 1, q is 12 and r is 40; and (2) when X is P or As and a is 6, M is Mo or W, p is 2, q is 18 and r is 62, and a process for preparing a glycoside derivative by using said catalyst.
本发明公开了一种糖苷催化剂,它包含至少一种由式 H aX pM qO r-bH₂O 表示的杂多酸。
H aX pM qO r-bH₂O
其中 X 是 P、As、Si 或 Ge,M 是至少一种选自 Mo、W 和 V 组成的组的物质,a 是 3 4 或 6,b 是 0 至 30 的整数,p 是 1 或 2,q 是 12 或 18,r 是 40 或 62,但条件是当 X 是 P 或 As 时,a 是 3 或 6;当 X 是 Si 或 Ge 时,a 是 4;以及 (1) 当 X 为 P 或 As 且 a 为 3,或当 X 为 Si 或 Ge 且 a 为 4 时,M 为至少一种选自 Mo、W 和 V 组成的组的物质,p 为 1,q 为 12,r 为 40;以及 (2) 当 X 为 P 或 As 且 a 为 6 时,M 为 Mo 或 W,p 为 2,q 为 18,r 为 62,以及使用所述催化剂制备苷衍生物的工艺。