A synthesis of nikkomycin Z: Improved synthesis and protection of the pyridyl γ-hydroxy-α-aminobutanoic acid component
摘要:
The first synthesis of nikkomycin Z is described. An improvement of the isoxazoline-based methodology6,12 and an effective method for protection of lb were devised. The application of oxalyditriazole (23) for peptide coupling proved most effective in completing the synthesis. A new and efficient synthesis of the prerequisite pyridyl E-olefin (5) is also described.
Nikkomicins, a process for their preparation and their use as agents for
申请人:Bayer Aktiengesellschaft
公开号:US04315922A1
公开(公告)日:1982-02-16
Pesticidally active substantially pure nikkomicin fractions obtained from Streptomyces tendae Ettlinger et al Tu 901, the fractions being selected from the group consisting of ##STR1## a mixture of nikkomicin I and J, and a mixture of nikkomicin M and N.
从Streptomyces tendae Ettlinger et al Tu 901获得的具有杀虫活性的纯度显著的尼科霉素分离物,所述分离物选自以下组合:##STR1## 尼科霉素I和J的混合物,以及尼科霉素M和N的混合物。
A Practical and Scalable Manufacturing Process for an Antifungal Agent, Nikkomycin Z
作者:Christopher J. Stenland、Lev G. Lis、Frederick J. Schendel、Nicholas J. Hahn、Mary A. Smart、Amy L. Miller、Marc G. von Keitz、Vadim J. Gurvich
DOI:10.1021/op3003294
日期:2013.2.15
A scalable and reliable manufacturing process for nikkomycin Z HCl on a scale of 170 g has been developed and optimized. The process is characterized by a 2.3 g/L fermentation yield, 79% purification yield, and >98% relative purity of the final product. This method is suitable for further scale-up and cGMP production. The Streptomyces tendae Delta NikQ strain developed during the course of this study is superior to any previously reported strain in terms of higher yield and purity of nikkomycin Z.
A synthesis of nikkomycin Z: Improved synthesis and protection of the pyridyl γ-hydroxy-α-aminobutanoic acid component
作者:Anil K. Saksena、Raymond G. Lovey、Viyyoor M. Girijavallabhan、Henry Guzik、Ashit K. Ganguly
DOI:10.1016/s0040-4039(00)73678-1
日期:1993.5
The first synthesis of nikkomycin Z is described. An improvement of the isoxazoline-based methodology6,12 and an effective method for protection of lb were devised. The application of oxalyditriazole (23) for peptide coupling proved most effective in completing the synthesis. A new and efficient synthesis of the prerequisite pyridyl E-olefin (5) is also described.
Chemistry of the neopolyoxins, pyrimidine and imidazoline nucleoside peptide antibiotics
作者:Masakazu Uramoto、Kimie Kobinata、Kiyoshi Isono、Tsutomu Higashijima、Tatsuo Miyazawa、Ellen E. Jenkins、James A. McCloskey
DOI:10.1016/0040-4020(82)80135-x
日期:1982.1
and C were isolatedfrom the culturefiltrate of Streptomyces cacaoi subsp. asoensis. Their absolute structures have been established on the basis of chemical and spectroscopic evidence. They are structural analogs of the polyoxins. As a nucleobase, neopolyoxin C possesses uracil, while neopolyoxins A and B contain the imidazoline moiety. A ring contraction reaction of pyrimidine nucleoside into imidazoline