Patent number: 6184376
Abstract: Methods and novel intermediates of the formula:
wherein R6 and R7 are lower alkyl or benzyl or R6 and R7 taken together are —CH2CH2—, —CH2CH2CH2— or —CH2CH2CH2CH2CH2—, R8 is C1-C21 alkyl or a C2-C21 monounsaturated alkenyl, which may optionally be substituted with substitution substituents independently selected from the group consisting of hydroxy, C1-C6 alkyl, C1-C6 alkoxy, C1-C6 alkoxy C1-C6 alkyl, C1-C6 alkanoyl, amino, halo, cyano, azido, oxo, mercapto and nitro, and R9 is an alcohol protecting group. The intermediates are useful for the preparation of acyclic nucleoside derivatives of the formula:
where one of R1 and R2 is an amino acid acyl group and the other of R1 and R2 is a —C(O)C3-C21 saturated or monounsaturated, optionally substituted alkyl and R3 is OH or H; or a pharmaceutically acceptable salt thereof.
Type:
Grant
Filed:
August 6, 1998
Date of Patent:
February 6, 2001
Assignee:
Mediver AB
Inventors:
M. Robert Leanna, Steven M. Hannick, Michael Rasmussen, Jien-Heh J. Tien, Lakshmi Bhagavatula, Pulla Reddy Singam, Bradley D. Gates, Lawrence Kolaczkowski, Ramesh R. Patel, Greg Wayne, Greg Lannoye, Weijiang Zhang, Zhenping Tian, Kirill A. Lukin, Bikshandarkoil A. Narayanan, David A. Riley, Howard Morton, Sou-Jen Chang, Cynthia B. Curty, Daniel Plata, John Bellettini, Bhadra Shelat, Tiffany Spitz, Cheng-Xi Yang
