An Efficient RCM-Based Synthesis of Orthogonally Protected meso-DAP and FK565
摘要:
A condensation-ring-close-ring-open sequence was employed for the synthesis of orthogonally protected meso-2,6-diaminopimelic acid, starting from easily accessible chiral synthons. Condensation of suitably protected L-allylglycine and D-vinylglycinol derivatives was followed by Grubbs' ring-closing metathesis to generate the key lactam intermediate. This strategy has been applied to a concise total synthesis of the potent immunostimulatory peptide FK565.
An Efficient RCM-Based Synthesis of Orthogonally Protected meso-DAP and FK565
摘要:
A condensation-ring-close-ring-open sequence was employed for the synthesis of orthogonally protected meso-2,6-diaminopimelic acid, starting from easily accessible chiral synthons. Condensation of suitably protected L-allylglycine and D-vinylglycinol derivatives was followed by Grubbs' ring-closing metathesis to generate the key lactam intermediate. This strategy has been applied to a concise total synthesis of the potent immunostimulatory peptide FK565.
Metal-Free Cyclization of <i>ortho</i>
-Nitroaryl Ynamides and Ynamines towards Spiropseudoindoxyls
作者:Niels Marien、B. Narendraprasad Reddy、Freija De Vleeschouwer、Steven Goderis、Kristof Van Hecke、Guido Verniest
DOI:10.1002/anie.201800340
日期:2018.5.14
tuted arenes and secondary amines results in the formation of polycyclic pseudoindoxyls in a single step. The reaction mechanism leading to these fused ring systems was investigated, and is believed to involve the initial formation of nitroarylated ynamines/ynamides. These intermediates cycloisomerize towards N‐alkenyl‐tethered 2‐aminoisatogens via a carbene intermediate as demonstrated by QTAIM (quantum
(<i>S</i>,<i>S</i>)-(+)-Pseudoephedrine α-Iminoglyoxylamide as a Chiral Glycine Cation Equivalent: A Modular and Flexible Approach to Enantioenriched α-Amino Ketones
作者:Nerea Ruiz、Jose L. Vicario、Dolores Badía、Luisa Carrillo、Beatriz Alonso
DOI:10.1021/ol800934r
日期:2008.6.1
S)-(+)-pseudoephedrine as a valuable chiral electrophile for the preparation of alpha-amino carbonyl compounds. In this context, the addition of Grignardreagents to the azomethine moiety of this chiral electrophile afforded the expected alpha-amino amide adducts in good yields and diastereoselectivities. Moreover, these adducts have been transformed into enantioenriched alpha-amino ketones by exploiting
Lee, Jung Gyu; Choi, Kyung Il; Pae, Ae Nim, Journal of the Chemical Society. Perkin Transactions 1 (2001), 2002, # 10, p. 1314 - 1317
作者:Lee, Jung Gyu、Choi, Kyung Il、Pae, Ae Nim、Koh, Hun Yeong、Kang, Yonghan、Cho, Yong Seo
DOI:——
日期:——
An Efficient RCM-Based Synthesis of Orthogonally Protected <i>m</i><i>eso</i>-DAP and FK565
作者:Juan R. Del Valle、Murray Goodman
DOI:10.1021/jo0485738
日期:2004.12.1
A condensation-ring-close-ring-open sequence was employed for the synthesis of orthogonally protected meso-2,6-diaminopimelic acid, starting from easily accessible chiral synthons. Condensation of suitably protected L-allylglycine and D-vinylglycinol derivatives was followed by Grubbs' ring-closing metathesis to generate the key lactam intermediate. This strategy has been applied to a concise total synthesis of the potent immunostimulatory peptide FK565.