Derivative of .alpha., .alpha.-trehalose and a process for preparing the same
First Claim
Patent Images
1. A derivative of α
- ,α
-trehalose represented by the following formula (I);
##STR5## wherein R1 represents an alkyl group having 1-29 carbon atoms, R2 represents a hydrogen atom or a benzyl group and R3 represents a hydrogen atom or a phenyl group.
1 Assignment
0 Petitions
Accused Products
Abstract
Derivatives of α,α-trehalose-6,6'"'"'-fatty acid diester having phosphoric ester groups in the molecule which are useful as a carcinostatic agent. One of the derivatives may be prepared by reacting diphenylphosphoryl chloridate with a derivative of 2,3,2'"'"',3'"'"'-tetra-O-benzyl-α,α-trehalose-6,6'"'"'-fatty acid diester. Another derivative may be obtained by substituting benzyl groups at 2,3,2'"'"',3'"'"' positions of trehalose with hydrogen atoms.
54 Citations
8 Claims
-
1. A derivative of α
- ,α
-trehalose represented by the following formula (I);
##STR5## wherein R1 represents an alkyl group having 1-29 carbon atoms, R2 represents a hydrogen atom or a benzyl group and R3 represents a hydrogen atom or a phenyl group.
- ,α
-
2. A process for preparing a derivative of 2,3,2'"'"',3'"'"'-tetra-O-benzyl-4,4'"'"'-bis-O-(diphenylphosphono)-α
- ,α
-trehalose-6,6'"'"'-fatty acid diester represented by the formula (Ia);
##STR6## wherein R1 represents an alkyl group having 1-29 carbon atoms, Bn, represents a benzyl group and Ph represents a phenyl group, which comprises;reacting a derivative of 2,3,2'"'"',3'"'"'-tetra-O-benzyl-α
,α
-trehalose-6,6'"'"'-fatty acid diester represented by formula (II);
##STR7## wherein R1 and Bn each have the same meaning as defined above, with a phosphoric ester represented by formula (III);
##STR8## wherein Ph has the same meaning as defined above and Y represents a halogen atom in a solvent in the presence of a base at a temperature of 0°
-50°
C. - View Dependent Claims (3)
- ,α
-
4. A process for preparing a derivative of 4,4'"'"'-di-O-phosphono-α
- ,α
-trehalose-6,6'"'"'-fatty acid diester represented by the formula (Ib);
##STR9## wherein R1 represents an alkyl group having 1-29 carbon atoms, which comprises;reducing a derivative of 2,3,2'"'"',3'"'"'-tetra-O-benzyl-4,4'"'"'-bis-O-(diphenylphosphono)-α
,α
-trehalose-6,6'"'"'-fatty acid diester represented by the formula (Ia);
##STR10## wherein R1 has the same meaning as defined above, Bn represents a benzyl group, and Ph represents a phenyl group with hydrogen in the presence of a reducing catalyst at a temperature in the range of from room temperature to 50°
C.; andfurther reducing the compound produced in the first step by hydrogen in the presence of a reducing catalyst at a temperature in the range of from room temperature to 50°
C. - View Dependent Claims (5, 6, 7, 8)
- ,α
Specification