Novel amino‐acid‐derived phthalazine reagents have been designed and synthesized for the enantioselectivefluorocyclizations of prochiral indoles. The scope of reaction is evidenced by 28 examples of fluorinated furoindole and pyrroloindole heterocycles bearing various functionalities with up to 99% ee. The resulting enantioenriched fluorinated products are found to be potent AChE inhibitors. Advantages
BF<sub>3</sub>-Promoted Divergent Reactions between Tryptophols and Propargylic Alcohols
作者:Kai Huang、Guorong Sheng、Ping Lu、Yanguang Wang
DOI:10.1021/acs.orglett.7b01769
日期:2017.8.4
Trifluoroboron-promoted cascade reactionsbetween tryptophols and propagylic alcohols furnished three types of skeletons, including carbazoles, cyclopenta[b]furo[2,3-b]indoles, and allenyl furo[2,3-b]indoles, with excellent selectivity based on the substrate structure. Tryptophols without a substituent on the 2-position of the indole ring reacted with 1,1,3-triphenylprop-2-yn-1-ol and 9-(phenyleth
三氟化硼促进的tryptophols和propagylic醇之间的级联反应提供三种类型的骨架,包括咔唑,环戊二烯并[ b ]呋喃并[2,3- b ]吲哚,和丙二烯基呋喃并[2,3- b ]吲哚,具有优良的选择性基于基板结构。在吲哚环的2位上没有取代基的色酚与1,1,3-三苯基丙-2-yn-1-ol和9-(苯基乙炔基)-9 H-芴-9 -ol反应生成咔唑和环戊[b]呋喃并[2,3- b ]吲哚,而2-取代的三甲基酚反应生成了烯基呋喃并[2,3 - b ]吲哚。
This invention relates to fluorinating agents and, more particularly, to chiral non-racemic fluorinating agents useful for enantioselective fluorination, as well as to their synthesis and use and other subject matter. The fluorinating agents are based on a substituted 1,4-diazabicyclo[2.2.2]octane (DABCO) skeleton and provide electrophillic fluorine enantioselectively.