Synthesis of functionalized benzo[1,3]dioxin-4-ones from salicylic acid and acetylenic esters and their direct amidation
作者:Rasmi P. Bhaskaran、Kalinga H. Nayak、Beneesh P. Babu
DOI:10.1039/d1ra05032j
日期:——
Direct synthesis of 4H-benzo[d][1,3]dioxin-4-one derivatives from salicylic acids and acetylenic esters (both mono- and disubstituted) has been described. The reaction is mediated by CuI and NaHCO3 in acetonitrile. Room temperature amidation of the synthesized 1,3-benzodioxinones with primary amines readily afforded the corresponding salicylamides in moderate to good yields.
已经描述了从水杨酸和炔属酯(单取代和双取代)直接合成 4 H-苯并[ d ][1,3]dioxin-4-one 衍生物。该反应由乙腈中的 CuI 和 NaHCO 3介导。合成的 1,3-苯并二恶酮与伯胺的室温酰胺化很容易以中等至良好的收率提供相应的水杨酰胺。
One-Pot Synthesis of Fused Pyridazino[4,5-b][1,4]oxazepine-diones via Smiles Rearrangement
Fused pyridazino[4,5-b][1,4]oxazepine-diones were easily obtained in moderate to excellent yields via Smiles rearrangement. The synthetic approach is supported by a one-pot couplingSmiles rearrangement-cyclization process. This process has potential applications in the synthesis of biologically and medicinally relevant compounds.
Sulphonylpiperidine derivatives containing an aryl or heteroaryl group for use as matrix metalloproteinase inhibitors
申请人:Burrows Nicholas Jeremy
公开号:US20060173041A1
公开(公告)日:2006-08-03
A compound of formula (1), wherein B is an ortho substituted monocyclic aryl or heteroaryl group or a bicyclic aryl or heteroaryl group; useful in the inhibition of one or more metalloproteinases, and in particular TACE.
Aryl- and heteroaryl-substituted urea compounds useful in the treatment of diseases and conditions related to DNA damage or lesions in DNA replication are disclosed. Methods of making the compounds, and their use as therapeutic agents, for example, in treating cancer and other diseases characterized by defects in DNA replication, chromosome segregation, or cell division also are disclosed.
Gold(I)-catalyzed heteroannulation affords the efficient and straightforward construction of heterocyclic compounds. Herein, we developed a gold(I)-catalyzed heteroannulation of salicylic amides with alkynes producing a broad range of 1,3-benzoxazin-4-ones. The utility of this protocol was highlighted by synthesizing variously substituted benzoxazinones containing quaternary carbon centers, showing