Výsledky vyhledávání - "Seunguk Paik"

Isolation and Synthesis of Tryptamine Derivatives from a Symbiotic Bacterium Xenorhabdus nematophilus PC

Autor: Seunguk Paik, Seok Burm Choe, Bum Rae Cho, Heai Ku Park, Hong Sik Byun, Seong Il Suh, Myung Kwang Park, Chun Soo Lee, Seong Hoon Jhun

Publikováno v: Bulletin of the Korean Chemical Society. 24:623-626

Nematophin and its analog incorporating tryptamine unit have been isolated and characterized from strain XR-PC of a symbiotic bacterium Xenorhabdus nematophilus, which was newly isolated from Korean entomopathogenic nematodes. The stereoselective syn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d371c5e95205ad2ac5c2368987e3616d
https://doi.org/10.5012/bkcs.2003.24.5.623

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Synthesis of β-aminosulfonopeptides activated through selective N-nitration of a taurine amide unit

Autor: Seunguk Paik, Emil H. White

Publikováno v: Tetrahedron Letters. 37:4663-4666

β-Sulfonopeptides bearing a taurine in place of a penultimate amino acid unit were designed and synthesized as inhibitors of D-alanyl-D-alanine transpeptidases; N-nitration of the sulfonamide bond in the presence of multiple carboxamide groups was s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da98fd85e98b4990e98985bc06d70293
https://doi.org/10.1016/0040-4039(96)00903-3

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α-Aminosulfonopeptides as possible functional analogs of penicillin; evidence for their extreme instability

Autor: Emil H. White, Seunguk Paik

Publikováno v: Tetrahedron. 52:5303-5318

Sulfonopeptide analogs of acyl-D-Ala-D-Ala bearing an α-aminosulfonic acid moiety in the penultimate position have been synthesized using a Curtius rearrangement step. The sulfonopeptides were prepared and examined in aprotic solvents, but they prov

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f99bd09d09977c60ab71fe80e793069
https://doi.org/10.1016/0040-4020(96)00055-5

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Total Synthesis of Cryptophycins. Revision of the Structures of Cryptophycins A and C

Autor: Russell A. Barrow, Seunguk Paik, Richard E. Moore, Marcus A. Tius, Thomas Hemscheidt, Liang Jian

Publikováno v: Journal of the American Chemical Society. 117:2479-2490

The convergent total synthesis of cryptophycins C and D is described. It has been shown that in both natural products the absolute configuration of the a-amino acid corresponds to the D-series. The structural assignment for cryptophycin C has been co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::edcb2b5ca1d1b8aa94212a190e5a789e
https://doi.org/10.1021/ja00114a011

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N-acyl-N-nitrosoamino acids and peptides

Autor: Emil H. White, Seunguk Paik

Publikováno v: Tetrahedron Letters. 35:7731-7734

N-acylamino acids and peptides are readily nitrostated by N 2 O 4 and the products can be readily isolated. Hydrolysis of the N-nitrosoacylamino acids and polynitrosoacylpeptides in aqueous media (pH 1–8) occurs preferentially from the C-terminus.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee9f3e185928ada79046179419868c94
https://doi.org/10.1016/0040-4039(94)80104-5

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Mirabimide E, an Unusual N-Acylpyrrolinone from the Blue-Green Alga Scytonema mirabile: Structure Determination and Synthesis

Autor: Shmuel Carmeli, Jean M. Cullingham, Seunguk Paik, Richard E. Moore, Marcus A. Tius, Gregory M. L. Patterson

Publikováno v: Journal of the American Chemical Society. 116:8116-8125

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6bd1ca12206207604ee4989ce197a550
https://doi.org/10.1021/ja00097a019

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Revised structures and biosynthetic studies of tantazoles A and B

Autor: Wesley Y. Yoshida, Seunguk Paik, Gregory M. L. Patterson, Shmuel Carmeli, Richard E. Moore

Publikováno v: Tetrahedron Letters. 34:6681-6684

Revised structures are presented for tantazoles A ( 3 ) and B ( 4 ) and preliminary studies on their biosyntheses in the terrestrial blue-green alga Scytonema mirabile BY-8-1 are reported. Marfey analysis of the acid hydrolyzates shows that the absol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65334f6449a8941ed239e1787b00bf4a
https://doi.org/10.1016/s0040-4039(00)61674-x

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