Novel ramoplanin derivatives are disclosed. These ramoplanin derivatives exhibit antibacterial activity. As the compounds of the subject invention exhibit potent activities against gram positive bacteria, they are useful antimicrobial agents. Methods of synthesis and of use of the compounds are also disclosed.
Disclosed are compounds having the formula:
wherein R1, R2 and R3 are as defined herein, and methods of making and using the same, including use as inhibitors of BMP1, TLL1 and/or TLL2 and in treatment of diseases associated with BMP1, TLL1 and/or TLL2 activity.
A Novel Dehydrazination Reaction. V. The Formation of Various Amides from Aliphatic and Aromatic Carboxylic Acid Hydrazides in the Presence of Chloral
作者:Tetsuji Kametani、Osamu Umezawa
DOI:10.1248/cpb.14.369
日期:——
In the previous papers the reactions between aromatic, aliphatic and heterocyclic carboxylic acid hydrazides and either chloral or bromal in various alcohols were attempted and respective esters were obtained. In this paper the reactions of aromatic and aliphatic acid hydrazide with chloral in the presence of various amines were examined, leading eventually to reveal the formation of our expected acid amides as are shown in Table I and II. The intermediates in this reaction, 1-benzoyl-2-(2, 2, 2-trichloroethylidene) hydrazine (III : R=C6H5-, X=Cl) was found to form the amides (VI) when heated in amines. This fact indicated that the acid hydrazides converted to their amides through III.
A clean sweep: Aryl and aliphatic imines can be synthesized directly and efficiently from alcohols and amines under mild, neutral conditions with the liberation of only molecular hydrogen and water (see scheme; R=isopropyl, tert‐butyl). This general, environmentally benign reaction is catalyzed by a de‐aromatized ruthenium PNP pincer complex (0.2 mol %), and can proceed in toluene under an inert atmosphere
一目了然:在温和的中性条件下,醇和胺可仅由分子氢和水释放(见方案; R =异丙基,叔丁基),可直接有效地由醇和胺合成芳基和脂族亚胺。这种一般的,对环境无害的反应是由脱芳香化的钌PNP钳形配合物(0.2摩尔%)催化的,可以在甲苯中于惰性气氛或空气中进行。
Copper‐Catalyzed Substrate‐Controlled Carbonylative Synthesis of α‐Keto Amides and Amides from Alkyl Halides
作者:Fengqian Zhao、Han‐Jun Ai、Xiao‐Feng Wu
DOI:10.1002/anie.202200062
日期:2022.4.19
A copper-catalyzed highly selective double carbonylation of alkyl bromides and amines has been developed. Desired α-keto amides were obtained as the only products. Subsequently, under different conditions, the double and mono-carbonylations of alkyl iodides with amines were also achieved.