在本文中, 催化剂不同地取代的6的-free合成ħ -苯并[ c ^ ]色烯和6 ħ -苯并[ c ^ ]苯并吡喃-8-醇通过的级联反应2-(2-(烯丙氧基)苯基)呋喃 和 2-(2-(丙-2-炔氧基)苯基)呋喃,具有分子内Diels–Alder反应 呋喃 与未激活 烯烃/炔烃在MWI下的水性介质中进行了开发。另外,环保氧化作用还揭示了在没有任何活化剂/催化剂的情况下,使用H 2 O 2作为氧化剂,将6 H-苯并[ c ]色烯转化为相应的苯并[ c ]色烯-6 。
在本文中, 催化剂不同地取代的6的-free合成ħ -苯并[ c ^ ]色烯和6 ħ -苯并[ c ^ ]苯并吡喃-8-醇通过的级联反应2-(2-(烯丙氧基)苯基)呋喃 和 2-(2-(丙-2-炔氧基)苯基)呋喃,具有分子内Diels–Alder反应 呋喃 与未激活 烯烃/炔烃在MWI下的水性介质中进行了开发。另外,环保氧化作用还揭示了在没有任何活化剂/催化剂的情况下,使用H 2 O 2作为氧化剂,将6 H-苯并[ c ]色烯转化为相应的苯并[ c ]色烯-6 。
Monohydrochloride Assisted Synthesis of Functionalized Isoxazoles and Pyrazoles from Allenic Ketones: First Synthesis of (<i>Z</i>
)-2-Methyl-7H-benzo[b]pyrazolo[5,1-d][1,5]oxazocines
作者:Debayan Sarkar、Sushree Ranjan Sahoo
DOI:10.1002/ejoc.201900008
日期:2019.3.14
A straight forward synthesis of substituted isoxazoles and pyrazoles from 1,2‐allenic ketones assisted by hydrochlorides of hydrazine and hydroxylamine is presented. In the process, the propyloxy‐phenyl pyrazoles were transformed to (Z)‐2‐methyl 7H benzo[b]pyrazolo[5,1‐d][1,5]oxazocines which are important and emissive compounds.
The addition of boron trifluoride etherate (BF3·OEt2) to allenic ketones has led to the isolation of the isolated boron difluoride enolates. The single-crystal structure of boron enolate has been solved. The unprecedented C1–C10 migration of (Z)-β-difluoroboryloxy ether derivatives is observed to deliver rearranged phenol derivatives which are functionalized to C-2 alkyl-chromenones. Interestingly
将三氟化硼醚合物 (BF 3 ·OEt 2 ) 添加到烯酮中导致分离出的二氟化硼烯醇化物。已解决了烯醇硼的单晶结构。观察到 ( Z )-β-二氟硼氧基醚衍生物的前所未有的 C 1 -C 10迁移产生了重排的苯酚衍生物,这些衍生物被官能化为 C-2 烷基色酮。有趣的是,分离的硼烯醇化物表现出显着的抗癌特性。