Roles of the Synergistic Reductive <i>O</i>-Methyltransferase GilM and of <i>O</i>-Methyltransferase GilMT in the Gilvocarcin Biosynthetic Pathway
作者:Nidhi Tibrewal、Theresa E. Downey、Steven G. Van Lanen、Ehesan Ul Sharif、George A. O’Doherty、Jürgen Rohr
DOI:10.1021/ja305113d
日期:2012.8.1
synthetically prepared intermediates. The studies revealed GilMT as a typical S-adenosylmethionine (SAM) dependent O-methyltransferase, but GilM was identified as a pivotal enzyme in the pathway that exhibits dual functionality in that it catalyzes a reduction of a quinoneintermediate to a hydroquinone, which goes hand-in-hand with a stabilizing O-methylation and a hemiacetalformation. GilM mediates its
Total Synthesis of Jadomycin A and a Carbasugar Analogue of Jadomycin B
作者:Mingde Shan、Ehesan U. Sharif、George A. O'Doherty
DOI:10.1002/anie.201005329
日期:2010.12.3
syntheses of jadomycin A and the carbasugaranalogue of jadomycinB have been achieved in 6 and 20 longest linear steps, respectively. The key ring system of the aglycone was prepared by a 6π‐electron electrocyclic ring closure and subsequent hemiaminal ring closure. Acid sensitivity of the glycosidic bond in jadomycinB (see structure; X=O) precluded its synthesis but led to the carbasugaranalogue (X=CH2)
一个人的垃圾就是另一个人的宝:jadomycin A 和jadomycin B 的碳糖类似物的首次合成分别在 6 和 20 个最长的线性步骤中完成。苷元的关键环系统是通过 6π 电子电环闭合和随后的半胺环闭合制备的。jadomycin B 中糖苷键的酸敏感性(参见结构;X=O)阻止了它的合成,但导致了碳糖类似物(X=CH 2)。
De Frutos, Oscar; Atienza, Carmen; Echavarren, Antonio M., European Journal of Organic Chemistry, 2001, # 1, p. 163 - 171
作者:De Frutos, Oscar、Atienza, Carmen、Echavarren, Antonio M.
DOI:——
日期:——
Total Synthesis of Jadomycins B, S, T, and ILEVS1080
作者:Xiaoyu Yang、Biao Yu
DOI:10.1002/chem.201301297
日期:2013.6.24
Sweetening up jadomycin A: The first totalsynthesis of jadomycinsB, S, T, and ILEVS1080 has been achieved, featuring construction of the unique 8H‐benz[b]oxazolo[3,3‐f]phenanthridine skeleton by biomimetic condensation of a quinone aldehyde with amino acid sodium salts and elaboration of the glycosides by Mitsunobu condensation (see figure).
增甜杰霉素霉素:杰霉素霉素B,S,T和ILEVS1080的第一个全合成物已经实现,其特征是通过仿生缩合a来构建独特的8 H-苯并[ b ]恶唑并[3,3-f]菲啶骨架。醌醛与氨基酸钠盐的结合,以及通过Mitsunobu缩合精制糖苷(见图)。