Palladium‐Catalyzed Synthesis of 6
<i>H</i>
‐Dibenzo[
<i>c,h</i>
]chromenes and 5,6‐Dihydrobenzo[
<i>c</i>
]phenanthridines: Application to the Synthesis of Dibenzo[
<i>c,h</i>
]chromene‐6‐ones, Benzo[
<i>c</i>
]phenanthridines, and
<i>Arnottin I</i>
作者:Subhendu Pramanik、Moumita Jash、Debasmita Mondal、Chinmay Chowdhury
DOI:10.1002/adsc.201900833
日期:2019.11.19
6H‐Dibenzo[c,h]chromenes and 5,6‐dihydrobenzo[c]phenanthridines have been synthesized via Palladium (II)‐catalyzed domino reactions of acetylenic substrates involving intramolecular trans‐oxo/amino palladation onto the triple bond followed by nucleophilic addition of the intermediate to a tethered cyano/aldehyde. The scope of this reaction was extended through one step conversion of some of the products
通过钯(II)催化的炔属底物的多米诺骨反应,合成了6 H-二苯并[ c,h ]色环和5,6-二氢苯并[ c ]菲啶,涉及分子内反式-羰基/氨基palpalation到三键,然后是亲核的将中间体加到束缚的氰基/醛中。通过将一些产物一步转化为6 H-二苯并[ c,h ]铬-6-6和苯并[ c ]菲啶扩大了反应的范围。这种方法的使用导致了天然产物Arnottin I的正式全合成。