[EN] DIHYDROISOXAZOLYL SUBSTITUTED TETRAHYDROFURAN COOMPOUNDS AS INTERMEDIATES IN THE PREPARATION OF 2-(PURIN-9-YL) - TETRAHYDROFURAN DERIVATIVES<br/>[FR] COMPOSES DE TETRAHYDROFURAN DE DIHYDROISOXAZOLYLE SUBSTITUES UTILISES EN TANT QU'INTERMEDIAIRE DANS LA PREPARATION DE DERIVES DE 2-(PURINE-9-YL) - TETRAHYDROFURAN
申请人:GLAXO GROUP LTD
公开号:WO2003080604A1
公开(公告)日:2003-10-02
Dihydroisoxazolyl substituted Tetrahydrofuran compounds as intermediates in the preparation of 2 (puxin-9-y1)-tetrahydrofuran derivatives A process for preparing a compound of formula (I) which comprises dehydration of a compound of formula (II) according to Step (i): wherein R1 represents methyl, ethyl, -CH=CP2, n-propyl, -CH2FH=CH2, -CH=CHCH3, isopropyl, isopropenyl, cyclopropyl, cyclopropenyl, cyclôpropylmethyl, cyclopropenylmethyl, -CH (OH) CH3, - (CH2) q halogen, - (CH 2) hY (CH2) iH, - (CH2) kZ, - (CH2)hCO(CH2)oH, - (CH2)rS (O) t (CH2) sH or - (CH 2 )kC( (CH2)uH)=NO(CH2)vH; wherein Y represents O, S or NH (CH2)j; Z represents -COO(CH2)1H or -CON (CH2)mH((CH2)nH); q represents an intégér 0 to 3; h represents an integer 0 to 2; i represents an integer 0 to 2 such that h+i is in the range 0 to 3; j represents an integer 0 to 2 such that h+i+j is in the range 0 to 3; k represents 0 or 1; 1 represents 1 or 2, such that k+ 1 is in the range 1 to 2; m and n independently represent an integer 0 to 2 such that k+m+n is in the range 0 to 2; o represents an integer 0 to 2 such that h+o is in the range 0 to 2; r and s independently represent 1 or 2 such that r+s is in the range 2 to 3; t represents 1 or 2; u and v independently represent 0 or 1 such that k+u+v is in the range O to 1; L1 and L2 represent hydroxy or a protected derivative' thereof; and L3 represent a leaving group.