区域选择性的,简单和一系列[2 + 3] -环产品,快速合成2 - 11,4-(4- RC 2 HN 3)C 6 ˚F 4 CO 2的Et(2:R = Ph值; 3:R t = CMe 2 OH;4:R = CH 2 OH;5:R = CO 2 Et;6:R = n -C 5 H 11;7:R = CH 2 O- o- C 6 H 4 CHO;8: R = CH2 O- p -C 6 H 4 NHBoc; 9:R = CH 2 O- p -C 6 H 4 CH 2 OH; 10:R = CH 2 O 2 CC 6 F 5;R = CH 2 O 2 CC 6 F 5。11:R = p -C 6 H 4 Bu- t),在4-叠氮基-2,3,5,6-四氟苯甲酸酯1,并在铜催化的点击化学反应条件下制备了许多取代的炔烃。优化的条件包括的CuBr和Et的应用3的二氯甲烷ñ。通过1D和2D NMR和
Regio- and diastereoselective reactions of chiral secondary alkylcopper reagents with propargylic phosphates: preparation of chiral allenes
作者:Juri Skotnitzki、Alexander Kremsmair、Daniel Keefer、Franziska Schüppel、Brieuc Le Cacher de Bonneville、Regina de Vivie-Riedle、Paul Knochel
DOI:10.1039/c9sc05982b
日期:——
SN2′-substitution of secondary alkylcopper reagents with propargylic phosphates enables the preparation of stereodefined alkylallenes. By using enantiomerically enriched alkylcopper reagents and enantioenriched propargylic phosphates as electrophiles anti-SN2′-substitutions were performend leading to α-chiral allenes in good yields with excellent regioselectivity and retention of configuration. DFT-calculations
仲烷基铜试剂与炔丙基磷酸酯的非对映选择性S N 2'取代使得能够制备立体确定的烷基亚烷基。通过使用对映体富集的烷基铜试剂和对映体富集的炔丙基磷酸酯作为亲电子试剂,抗-S N 2'取代反应以高收率产生α-手性烯丙基,具有出色的区域选择性和构型保留。进行DFT计算以合理化这些烷基铜试剂在各种溶剂中的结构,强调它们在THF中的构型稳定性。
ESTER COMPOUND, AND NON-AQUEOUS ELECTROLYTE SOLUTION AND LITHIUM SECONDARY BATTERY EACH USING THE ESTER COMPOUND
申请人:Ube Industries, Ltd.
公开号:EP2108640B1
公开(公告)日:2012-07-25
US8263268B2
申请人:——
公开号:US8263268B2
公开(公告)日:2012-09-11
Identifying the potential of pulsed LED irradiation in synthesis: copper-photocatalysed C–F functionalisation
作者:Thomas P. Nicholls、Johnathon C. Robertson、Michael G. Gardiner、Alex C. Bissember
DOI:10.1039/c8cc02244e
日期:——
It has been reported that pulsedirradiation can improve photosynthetic activity and phytochemical production in plants. Intrigued and inspired by these observations, we postulated that pulsedirradiation strategies may have broader implications in organic synthesis. We report here the results of a proof-of-concept study demonstrating that pulsedLEDirradiation enhances the efficiency of a visible