摘要:
Novel processes towards the synthesis of the antiviral valomaciclovir stearate in which an esterified guanine acetal is reduced to the corresponding alcohol, reacted with an activated amino acid and N-deprotected. The esterified guanine acetal is prepared from a 9-guanine derivative bearing an acyclic hydroxymethylbutylacetal. The processes are amendable to one-pot reactions.
摘要:
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.
摘要:
Methods and novel intermediates 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.
摘要:
The present invention discloses (1S,5S)-3-(5,6-dichloro-3-pyridinyl)-3,6-diazabicyclo[3.2.0]heptane, salts thereof, and its use to treat pain and other disorders associated with the nicotinic acetylcholine receptor.
摘要:
Semisynthetic antibiotics with improved therapeutic properties made from erythromycin are disclosed. Certain 4"-carbamates of erythromycin, its derivatives, and their salts and esters show superior in vitro antimicrobial activity and reduced gastrointestinal stimulation compared to the parent compounds.
摘要:
The present invention relates to a process for the preparation of substituted cyclobutanes and their use as intermediates for the preparation of anti-viral nucleoside analogs.
摘要:
The present invention relates to a process for the preparation of substituted cyclobutanes and their use as intermediates for the preparation of anti-viral nucleoside analogs.
摘要:
A compound of the formula: ##STR1## wherein A is a purin-9-yl group, a heterocyclic isostere of a purin-9-yl group, a pyrimidin-1-yl group or a heterocyclic isostere of a pyrimidin-1-yl group; E is hydrogen, --CH.sub.2 OH or --OH; and G and D are independently selected from hydrogen, C.sub.1 to C.sub.10 alkyl, --OH, --CH.sub.2 OH, --CH.sub.2 OR.sub.20 wherein R.sub.20 is C.sub.1 to C.sub.6 alkyl, --CH.sub.2 OC(O)R.sub.21 wherein R.sub.21 is C.sub.1 to C.sub.10 alkyl, --CH.sub.2 OC(O)CH(R.sub.22)(NHR.sub.23) wherein R.sub.22 is the side chain of any of the naturally occurring amino acids and R.sub.23 is hydrogen or --C(O)CH(R.sub.24)(NH.sub.2) wherein a R.sub.24 is the side chain of any of the naturally occurring amino acids, --CH.sub.2 SH, --CH.sub.2 Cl, --CH.sub.2 F, --CH.sub.2 Br, --CH.sub.2 I, --C(O)H, --CH.sub.2 CN, --CH.sub.2 N.sub.3, --CH.sub.2 NR.sub.1 R.sub.2, --CO.sub.2 R.sub.1, --CH.sub.2 CH.sub.2 OH, --CH.sub.2 CH.sub.2 OR.sub.20 wherein R.sub.20 is as defined above, --CH.sub.2 CH.sub.2 OC(O)R.sub.21 wherein R.sub.21 is as defined above, --CH.sub.2 CH.sub.2 OC(O)CH(R.sub.22)(NHR.sub.23) wherein R.sub.22 and R.sub.23 are as defined above, --CH.sub.2 CH.sub.2 PO.sub.3 H.sub.2, --CH.sub.2 OPO.sub.3 H.sub.2, --OCH.sub.2 PO.sub.3 H.sub.2 and --CH.sub.2 CO.sub.2 R.sub.3 wherein R.sub.1 and R.sub.2 are independently selected from hydrogen and C.sub.1 to C.sub.10 alkyl and R.sub.3 is hydrogen, C.sub.1 to C.sub.10 alkyl, carboxyalkyl or aminoalkyl; or a pharmaceutically acceptable salt thereof.
摘要翻译:下式的化合物:其中A是嘌呤-9-基,嘌呤-9-基的杂环等价基,嘧啶-1-基或嘧啶-1-基的杂环等价基 组; E是氢,-CH 2 OH或-OH; 并且G和D独立地选自氢,C1-C10烷基,-OH,-CH2OH,-CH2OR20,其中R20是C1-C6烷基,-CH2OC(O)R21,其中R21是C1-C10烷基,-CH2OC(O) CH(R22)(NHR23)其中R22是任何天然存在的氨基酸的侧链,R 23是氢或-C(O)CH(R 24)(NH 2),其中R 24是任何天然存在的氨基酸的侧链 发生的氨基酸,-CH 2 SH,-CH 2 Cl,-CH 2 F,-CH 2 Br,-CH 2 I,-C(O)H,-CH 2 CN,-CH 2 N 3,-CH 2 NR 1 R 2,-CO 2 R 1,-CH 2 CH 2 OH,-CH 2 CH 2 OR 20,其中R 20如上定义, -CH 2 CH 2 OC(O)R 21,其中R 21如上定义,-CH 2 CH 2 OC(O)CH(R 22)(NHR 23)其中R 22和R 23如上定义,-CH 2 CH 2 PO 3 H 2,-CH 2 OPO 3 H 2,-OCH 2 PO 3 H 2和-CH 2 CO 2 R 3,其中R 1和R 2是 独立地选自氢和C1至C10烷基,R3是氢,C1至C10烷基,羧基烷基或氨基烷基; 或其药学上可接受的盐。