19647-68-8Relevant articles and documents
Strategy for O-alkylation of serine and threonine from serinyl and threoninyl acetic acids by photoinduced decarboxylative radical reactions: Connection between serine/threonine and carbohydrates/amino acids at the side chain
Yamamoto, Takashi,Iwasaki, Tomoya,Morita, Toshio,Yoshimi, Yasuharu
, p. 3702 - 3709 (2018/04/14)
O-Alkylations of serine and threonine derivatives at the hydroxy group were achieved using photoinduced decarboxylative radical reactions of serinyl and threoninyl acetic acids with an organic photocatalyst without racemization under mild conditions. Photoinduced decarboxylative radical additions of serinyl and threoninyl acetic acids to electron-deficient alkenes provided linked serine and threonine with carbohydrates and amino acids at the side chain. In addition, O-methylations containing deuterium and O-benzylation of serine were performed under similar photochemical conditions.
Efficient synthesis of (R)-6-benzyloxycarbonylamino-1-methyl-4-(3- methylbenzyl)hexahydro-1,4-diazepine. I
Harada, Hiroshi,Morie, Toshiya,Kato, Shiro
, p. 1160 - 1164 (2007/10/03)
An efficient and practical method for large scale synthesis of (R)-6- benzyloxycarbonylamino-1-methyl-4-(3-methylbenzyl)hexahydro-1,4-diazepine (R- 3), which is a key intermediate in the synthesis of DAT-582, a potent and selective serotonin-3 receptor antagonist, is described. The precursor of R- 3, the (S)-2,3-diaminopropylaminoacetate S-5, was obtained from the chiral triaminopropane derivative R-19. Nucleophilic reaction of the chiral mesylate R-11 with 3-methylbenzylamine gave the racemic 2,3-diaminopropylaminoacetate (±)-5 via the achiral azetidinium cation 12, while the reaction of the N- protected mesylate R-14 produced the desired triamine S-15 but in poor yield. However, reaction of the N-protected mesylate S-18 with a large excess of methylamine proceeded smoothly to afford R-19 in good yield. S-5 was converted into R-3 with >99% enantiomeric excess using an intramolecular reductive cyclization method.
Reaction of Trimethylsilylamines with N-Cbz-L-Serine-β-Lactone: A Convenient Route to Optically Pure β-Amino-L-alanine Derivatives
Ratemi, Elaref S.,Vederas, John C.
, p. 7605 - 7608 (2007/10/02)
Trimethylsilylamines, Me3Si-NR2, react with N-Cbz-L-serine-β-lactone in acetonitrile primarily by alkyl oxygen cleavage of the lactone ring to give optically pure N-Cbz-β-amino-L-alanine derivatives in good yields.Use of halogenated sovents such as chloro