Synthesis of 2-Oxa and 2-Aza Analogs of Pyrrolizidine-3,5-diones (Lukes-Sorm Dilactam)
摘要:
The synthesis of 2-oxa and 2-aza analogs of pyrrolizidine-3,5-dione (Lukes-Sorm dilactam), which has amnesia reversal activity, is reported. Optically active (+)-2-oxa and (+)-2-aza analogs [(+)-2 and (+)-3] and racemic 2-aza analog and its 1-methoxycarbonyl derivatives [(+)-3 and (+)-13 and -14] were prepared from (-)-S-pyroglutamic acid and succinimide, respectively.
Synthesis of 2-Oxa and 2-Aza Analogs of Pyrrolizidine-3,5-diones (Lukes-Sorm Dilactam)
摘要:
The synthesis of 2-oxa and 2-aza analogs of pyrrolizidine-3,5-dione (Lukes-Sorm dilactam), which has amnesia reversal activity, is reported. Optically active (+)-2-oxa and (+)-2-aza analogs [(+)-2 and (+)-3] and racemic 2-aza analog and its 1-methoxycarbonyl derivatives [(+)-3 and (+)-13 and -14] were prepared from (-)-S-pyroglutamic acid and succinimide, respectively.
Sequential Acylation/Silylation/Hetero‐Claisen Rearrangement of Nitroalkanes for the Synthesis of Protected Hydroxyoxime Derivatives
作者:Yulia A. Antonova、Sema L. Ioffe、Alexey Yu. Sukhorukov、Andrey A. Tabolin
DOI:10.1002/ejoc.202100469
日期:2021.6.14
One-pot acylation-silylation sequence was developed for the synthesis of protected hydroxyoximes from aliphatic nitro compounds. Procedure is characterized by wide substrate scope for nitro compounds, acylating and silylating agents.
The Forgotten Pyrazines: Exploring the Dakin–West Reaction
作者:Martien A. Würdemann、Cristina Niţu、Stefaan M. A. De Wildeman、Katrien V. Bernaerts、Romano V. A. Orru
DOI:10.1002/chem.202000475
日期:2020.6.26
Pyrazines are an underreported class of N‐heterocycles available from nitrogen‐rich biomass presenting an interesting functional alternative for current aromatics. In this work, access to pyrazines obtained from amino acids by using the 90 year old Dakin–West reaction was explored. After a qualitative screening several functional proteinogenic amino acids proved good substrates for this reaction, which
There are described RORγ modulators of the formula (I),
and formula (II)
or stereoisomers, tautomers, pharmaceutically acceptable salts, solvates, or prodrugs thereof, wherein all substituents are defined herein. Also provided are pharmaceutical compositions comprising the same. Such compounds and compositions are useful in methods for modulating RORγ activity in a cell and methods for treating a subject suffering from a disease or disorder in which the subject would therapeutically benefit from modulation of RORγ activity, for example, autoimmune and/or inflammatory disorders.
N-acetylamino acids, related N-acetyl compounds and their topical use
申请人:——
公开号:US20030198656A1
公开(公告)日:2003-10-23
Compositions comprising N-acetylamino acids and/or related N-acetyl compounds are useful to alleviate or improve various cosmetic conditions and dermatological disorders, including changes or damage to skin, nail and hair associated with intrinsic aging and/or extrinsic aging, as well as changes or damage caused by extrinsic factors. The N-acetylamino acid and/or related N-acetyl compound composition may further comprise a cosmetic, pharmaceutical or other topical agent to enhance or create synergetic effects.
Methods to alleviate or improve various cosmetic conditions and dermatological disorders, including changes or damage to skin, nail and hair associated with intrinsic aging and/or extrinsic aging, as well as changes or damage caused by extrinsic factors using compositions comprising N-acetyl-cysteine (isomeric or non-isomeric forms) and/or free acid, salt, lactone, amide or ester forms of N-acetyl-cysteine are described. The methods provided may also comprise application of a composition further containing various cosmetic, pharmaceutical or other topical agents to enhance or create synergetic effects.