- Palladium/Zinc Co-Catalyzed Asymmetric Hydrogenation of γ-Keto Carboxylic Acids
-
A palladium-catalyzed asymmetric hydrogenation of levulinic acid has been successful developed by using Zn(OTf)2 as co-catalyst. The present method not only has provided a strategy in the palladium-catalyzed asymmetric hydrogenation of ketone, but also allowed the preparation of a wide range of chiral γ-valerolactones in good yields with excellent enantioselectivities.
- Zhang, Keyang,Zhang, Xuexin,Chen, Jingchao,Liu, Zixiu,Pan, Chunxiang,Zhu, Yuanbin,Wu, Shiyuan,Fan, Baomin
-
supporting information
p. 1229 - 1232
(2021/05/03)
-
- Pharmaceutically active benzoquinazoline compounds
-
Compounds of formula (I) or salts thereof, wherein the dotted line represents a single or double bond, R1is alkyl or amino optionally substituted by alkyl, alkanoyl or benzyl group; R2, R3, R4and R5are the same or different and each is selected from hydrogen, phenyl, halo, nitro, a group S(O)nR8wherein n is the integer 0, 1 or 2 and R8is halo or alkyl or a group NR9R10wherein R9and R10are both hydrogen, a group NR11R12wherein R11and R12are the same or different and each is hydrogen or alkyl, a group OR13wherein R13is hydrogen or C1-4alkyl optionally substituted by halo; a C1-4aliphatic group optionally substituted by a group OR14or NR14R15wherein R14and R15are the same or different and each is hydrogen or alkyl; or two of R2to R5are linked together to form a benzo group, or one of R2to R5is a group -X-Y-R16wherein X is CH2, NR17, CO or S(O)m, and Y is CH2, NR17, O, or S(O)m, or -X-Y- is a group -O-, -NR17-, -CH=CH- or -N=N-, are disclosed as pharmacological agents useful in the treatment of tumours. Pharmaceutical compositions and methods for the preparation of compounds of formula (I) are also described.
- -
-
-
- PHARMACEUTICAL COMPOUNDS
-
The present invention relates to novel benzoquinazoline thymidylate synthase inhibitors, to pharmaceutical formulations containing them and to their use in medicine
- -
-
-