Deprotection of Homoallyl (hAllyl) Derivatives of Phenols, Alcohols, Acids, and Amines
摘要:
The homoallyl moiety, (h)Allyl, is presented as a general protecting group for several functionalities. It can be chemoselectively removed via a sequential, one-pot cross-metathesis/elimination sequence.
We herein described a practical and efficient protocol for hydrodifluoromethylation of unactivated alkenes using readily available difluoroacetic anhydride as a difluoromethyl source by merging photocatalysis and N-hydroxyphthalimide activation. This method features a wide substrate scope and excellent compatibility with various functional groups, as demonstrated by more than 50 examples, including
Deprotection of Homoallyl (<sup>h</sup>Allyl) Derivatives of Phenols, Alcohols, Acids, and Amines
作者:Bruce H. Lipshutz、Subir Ghorai、Wendy Wen Yi Leong
DOI:10.1021/jo900012z
日期:2009.4.3
The homoallyl moiety, (h)Allyl, is presented as a general protecting group for several functionalities. It can be chemoselectively removed via a sequential, one-pot cross-metathesis/elimination sequence.
<scp>Cobalt‐Catalyzed</scp>
Intermolecular Hydroamination of Unactivated Alkenes Using
<scp>NFSI</scp>
as Nitrogen Source
作者:Peng‐Wei Sun、Ze Zhang、Xinyao Wang、Linshan Li、Yuxin Li、Zhengming Li
DOI:10.1002/cjoc.202100827
日期:2022.5
fluorinating reaction, N-fluorobenzenesulfonimide (NFSI) as amine source for hydroamination has seldom been reported. Here we developed a cobalt-catalyzed intermolecularhydroamination of unactivated alkenes using NFSI as nitrogen source under mild conditions. The reaction exhibits excellent chemo- and regio-selectivity with no hydrofluorination or linear-selectivity products. Notably, the reaction