Synthesis and biological evaluation of new fluconazole β-lactam conjugates linked via 1,2,3-triazole
作者:Jaisingh M. Divse、Santosh B. Mhaske、Chaitanya R. Charolkar、Duhita G. Sant、Santosh G. Tupe、Mukund V. Deshpande、Vijay M. Khedkar、Laxman U. Nawale、Dhiman Sarkar、Vandana S. Pore
DOI:10.1039/c6nj03117j
日期:——
μg mL−1. Compounds 12h, 12j and 12k showed promising antifungal activity against all the tested fungal pathogens except C. neoformans ATCC 34554 compared to fluconazole. Compound 12j in which the β-lactam ring was formed using para-anisidine and benzaldehyde was found to be more potent than fluconazole against all the fungal strains with an IC50 value of <0.015 μg mL−1 for Candida albicans (ATCC 24433)
Catalytic Conversion of Diazocarbonyl Compounds to Imines: Applications to the Synthesis of Tetrahydropyrimidines and β-Lactams
作者:Michael D. Mandler、Phong M. Truong、Peter Y. Zavalij、Michael P. Doyle
DOI:10.1021/ol403427s
日期:2014.2.7
The synthesis of α-carbonylimines by rhodium(II)-catalyzed reactions of α-diazoesters and organic azides has been developed and applied in hetero-Diels–Alder reactions to form highly functionalized tetrahydropyrimidines and in a one-pot, multicomponent transformation between aryldiazoacetates, p-anisyl azide, and an enonediazoacetate to produce β-lactams in high yields and diastereoselectivities.
Zinc metal-promoted nucleophilic addition of nonactivated alkyl iodides to aromatic aldimines in the presence of chlorotrimethylsilane in ethyl acetate–DMI
A variety of aromatic aldimines react with nonactivated alkyl iodides in the presence of zinc powder and a catalytic amount of chlorotrimethylsilane (TMSCl) in ethyl acetate–DMI to afford the corresponding α-alkylbenzylamine derivatives in good to excellent yields.
The combination of Et2Zn and RhCl(PPh3)3 led to the facile generation of a rhodium–hydride complex (Rh–H) that catalyzed the 1,4-reduction of α,β-unsaturatedesters. The resulting rhodium enolate performed as a Reformatsky-type reagent and reacted with various imines to give syn-β-lactams in good to excellent yields with high diastereoselectivity.
Et 2 Zn和RhCl(PPh 3)3的组合导致容易生成铑-氢化物络合物(Rh-H),该络合物催化α,β-不饱和酯的1,4-还原。所得的烯醇铑作为Reformatsky型试剂起作用,并与各种亚胺反应,以良好的非对映异构体收率以优异的产率得到合成的-β-内酰胺。
Cooperative Catalysis with Chiral Brønsted Acid-Rh<sub>2</sub>(OAc)<sub>4</sub>: Highly Enantioselective Three-Component Reactions of Diazo Compounds with Alcohols and Imines
作者:Wenhao Hu、Xinfang Xu、Jing Zhou、Wei-Jun Liu、Haoxi Huang、Juan Hu、Liping Yang、Liu-Zhu Gong
DOI:10.1021/ja801755z
日期:2008.6.1
An asymmetric three-componentreaction of diazocompounds and alcohols with imines catalyzed cooperatively by a rhodium complex and a chiral Brønsted acid provides a general and efficient entry to beta-amino-alpha-hydroxyl acid derivatives in high yields with excellent stereoselectivities.