A practicalsynthesis of (2R,3S)- and (2S,3R)-β-methyltryptophan ethyl ester (β-MeTrp-OEt) has been developed. Racemic threo-β-MeTrp-OEt was diastereoselectively prepared via crystallization-induced diastereomer transformation (CIDT) of the α-nitro equivalent of β-MeTrp-OEt. The enantiomers were resolved via diastereomeric salt formation using a half equivalent of (R)-2-(4-hydroxyphenoxy)propionic
Indole derivatives as somatostatin agonists or antagonists
申请人:Abe Hidenori
公开号:US20060223826A1
公开(公告)日:2006-10-05
The present invention provide a compound of the formula (I) wherein ring A represents an aromatic ring optionally having substituents; B, Y and Ya are the same or different and each represents a bond, etc.; R
1
and R
2
are the same or different and each represents a hydrogen atom, etc.; R
3
represents a hydrogen atom, etc.; R
4
and R
5
are the same or different and each represents a hydrogen, etc.; R
6
represents an indolyl group optionally having substituents; and Z and Za are the same or different and each represents a hydrogen atom, etc.; or a salt thereof or a prodrug thereof, having a somatostatin receptor binding inhibition activity and is useful for preventing and/or treating diseases associated with somatostatin.
An Efficient Synthesis Strategy to the Core Structure of 6–5–6–5–6-Membered Epipolythiodiketopiperazines
作者:Hannes F. Zipfel、Erick M. Carreira
DOI:10.1021/ol500990f
日期:2014.6.6
A concise route to the core structure 1 of 6-5-6-5-6-membered epipolythiodiketopiperazines is described. The strategy relies on construction of the pyrrolines by double nucleophilic opening of a bis(oxabicyclo[2.2.1]heptene) 2, obtained after bidirectional condensation of N,N'-diacetyldiketopiperazine (4) with aldehyde 3.
[EN] AMINE COMPOUNDS<br/>[FR] DERIVES D'INDOLE SERVANT D'ANTAGONISTE DE SOMATOSTATINE
申请人:TAKEDA CHEMICAL INDUSTRIES LTD
公开号:WO2004046107A1
公开(公告)日:2004-06-03
The present invention provide a compound of the formula (I) wherein ring A represents an aromatic ring optionally having substituents; B, Y and Ya are the same or different and each represents a bond, etc.; R1 and R2 are the same or different and each represents a hydrogen atom, etc.; R3 represents a hydrogen atom, etc.; R4 and R5 are the same or different and each represents a hydrogen, etc.; R6 represents an indolyl group optionally having substituents; and Z and Za are the same or different and each represents a hydrogen atom, etc.; or a salt thereof or a prodrug thereof, having a somatostatin receptor binding inhibition activity and is useful for preventing and/or treating diseases associated with somatostatin.
The discovery of a novel series of β-methyltryptophan (β MeTrp) derivatives as selective and orallyactive non-peptide somatostatin receptor 2 (SSTR2) agonists for the treatment of Type 2 diabetes is described. In our previous research, Compound A, β-MeTrp derivative with highly potent and selective SSTR2 agonistic activity IC50 (SSTR2/SSTR5) = 0.3/>100 (nM), was identified as a drug candidate for