Enantiopure Acetals of α-Alkynyl Carbonyl Compounds: Organoaluminum-Mediated 1,2-Shift of Cobalt-Complexed Alkynyl Group with Concomitant Capture by a Nucleophile
摘要:
在用路易斯酸和亲核试剂的基于有机铝的组合处理后,具有共络合炔基的手性甲磺酰氧基缩醛经历络合炔基的立体特异性1,2-位移以及有机铝试剂的配体R的伴随攻击。用 CAN 对产物进行解络,以高产率得到对映体纯形式的 α-炔基羰基化合物的手性缩醛。
Enantiopure Acetals of α-Alkynyl Carbonyl Compounds: Organoaluminum-Mediated 1,2-Shift of Cobalt-Complexed Alkynyl Group with Concomitant Capture by a Nucleophile
摘要:
在用路易斯酸和亲核试剂的基于有机铝的组合处理后,具有共络合炔基的手性甲磺酰氧基缩醛经历络合炔基的立体特异性1,2-位移以及有机铝试剂的配体R的伴随攻击。用 CAN 对产物进行解络,以高产率得到对映体纯形式的 α-炔基羰基化合物的手性缩醛。
Enantiopure Acetals of α-Alkynyl Carbonyl Compounds: Organoaluminum-Mediated 1,2-Shift of Cobalt-Complexed Alkynyl Group with Concomitant Capture by a Nucleophile
作者:Kimiko Taya、Tetsuya Nagasawa、Keisuke Suzuki
DOI:10.1055/s-1997-776
日期:1997.3
Upon treatment with the organoaluminum-based combination of Lewis acid and nucleophile, chiral mesyloxy acetal having a Co-complexed alkynyl group undergoes stereospecific 1,2-shift of the complexed alkynyl and the concomitant attack of te ligand R of the organoaluminum reagent. Decomplexation of the products with CAN gives the chiral acetals of α-alkynyl carbonyl compounds in enantiomerically pure form in high yields.
在用路易斯酸和亲核试剂的基于有机铝的组合处理后,具有共络合炔基的手性甲磺酰氧基缩醛经历络合炔基的立体特异性1,2-位移以及有机铝试剂的配体R的伴随攻击。用 CAN 对产物进行解络,以高产率得到对映体纯形式的 α-炔基羰基化合物的手性缩醛。