A one-pot two-step sequence involving an oxidation/imine-iminium formation/reduction allowed the N-alkylation of amines by alcohols without any epimerization when optically active alcohols and amines are involved in the process.
HIV replication inhibitors of formula
R
1
is hydrogen; aryl; formyl; C
1-6
alkylcarbonyl; C
1-6
alkyl; C
1-6
alkyloxycarbonyl;
R
2
, R
3
, R
6
and R
7
are hydrogen; hydroxy; halo; C
3-7
cycloalkyl; C
1-6
alkyloxy; carboxyl; C
1-6
alkyloxycarbonyl; cyano; nitro; amino; mono- or di(C
1-6
alkyl)amino; polyhaloC
1-6
alkyl; polyhaloC
1-6
alkyloxy; —C(═O)R
9
; optionally substituted C
1-6
alkyl, C
2-6
alkenyl or C
2-6
alkynyl;
R
4
and R
5
are hydroxy; halo; C
3-7
cycloalkyl; C
1-6
alkyloxy; carboxyl; C
1-6
alkyloxycarbonyl; formyl; cyano; nitro; amino; mono- or di(C
1-6
alkyl)amino; polyhaloC
1-6
alkyl; polyhaloC
1-6
alkyloxy; —C(═O)R
9
; cyano; —S(═O)
r
R
9
; —NH—S(═O)
2
R
9
; —NHC(═O)H; —C(═O)NHNH
2
; —NHC(═O)R
9
; Het; —Y-Het; optionally substituted C
1-6
alkyl, C
2-6
alkenyl or C
2-6
alkynyl;
R
5
is pyridyl, —C(═O)NR
5a
R
5b
; —CH(OR
5c
)R
5d
; —CH
2
—NR
5e
R
5f
; —CH═NOR
5a
; —CH
2
—O—C
2-6
alkenyl; —CH
2
—O—P(═O)(OR
5g
)
2
; —CH
2
—O—C(═O)—NH
2
; —C(═O)—R
5d
;
X is —NR
1
—, —O—, —CH
2
—, —S—;
pharmaceutical compositions containing these compounds as active ingredient and processes for preparing said compounds and compositions.
US9006243B2
申请人:——
公开号:US9006243B2
公开(公告)日:2015-04-14
Total synthesis of (R)-glycerol acetonide and the antiepileptic and hypotensive drug (-)-.gamma.-amino-.beta.-hydroxybutyric acid (GABOB): use of vitamin C as a chiral starting material
作者:Michael E. Jung、Teresa J. Shaw
DOI:10.1021/ja00540a022
日期:1980.9
Ascorbic acid (Vitamin C) (9) is shown to be a useful, inexpensive chiral starting material for natural products synthesis. It is converted in high yield via two synthetic operations into (R)-glycerol acetonide (7), the more inaccessible enantiomer of glycerol acetonide. Since D-(R)-glyceraldehydeacetonide (4) and the corresponding alcohol 1 have been used in many total syntheses of a wide variety