Suzuki cross-coupling on enantiomerically pure epoxides:: Efficient synthesis of diverse, modular amino alcohols from single enantiopure precursors
Suzuki cross-coupling on enantiomerically pure epoxides:: Efficient synthesis of diverse, modular amino alcohols from single enantiopure precursors
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DOI:
10.1021/jo062612t
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发表时间:
2007-04-27
影响因子:
3.6
通讯作者:
Pericas, Miquel A.
中科院分区:
文献类型:
--
作者:
Cattoen, Xavier;Pericas, Miquel A.
Suzuki arylation of enantiopure (4-bromophenyl)- or (3,5-dibromophenyl)glycidyl ethers has been achieved in toluene under Buchwald conditions [ArB(OH)(2) (1.1 equiv), Cs2CO3 (2 equiv), Pd-2(dba)(3)center dot C6H6 (1 mol %), S-Phos (4 mol %), toluene, 100 degrees C] allowing for the formation of modular arylglycidyl ethers not directly available in enantiopure form by epoxidation routes. These bulky ethers, when submitted to regioselective and stereospecific ring opening with ammonia [aq NH3, LiClO4 (1 equiv), THF, microwave irradiation (80 W), 125 degrees C] in a sealed tube, provide access to novel enantiopure beta-amino alcohols which, in turn, provide an easy access to structurally complex C-2 symmetrical bisoxazolines.