合成了一种新型的C 1对称BINOL-叔吡啶配体(R)-5。发现该配体与ZnEt 2和Ti(O i Pr)4结合可在0°C催化丙酸甲酯与各种芳香醛的高度对映选择性反应(最高ee达98%ee),从而得到可合成使用的γ-羟基-α,β-炔属酯。与先前报道的BINOL系统相比,(R)-5的使用需要减少量的手性配体而不添加路易斯碱。对于许多底物,它显示出更高的对映选择性。
Highly Enantioselective Zinc/Amino Alcohol-Catalyzed Alkynylation of Aldehydes
作者:Jiang-Chun Zhong、Shi-Cong Hou、Qing-Hua Bian、Min-Min Yin、Ri-Song Na、Bing Zheng、Zhi-Yuan Li、Shang-Zhong Liu、Min Wang
DOI:10.1002/chem.200900070
日期:2009.3.16
Meeting the challenge: The zinc/aminoalcoholcatalyzedenantioselectiveaddition of terminal alkynes to aldehydes is effective with both phenylacetylene and methyl propiolate, leading to chiral secondary propargyl alcohols with very high enantioselectivity (see scheme).
Highly enantioselective catalytic methyl propiolate addition to both aromatic and aliphatic aldehydes
作者:Jian Huang、Siping Wei、Li Wang、Chun Zhang、Shuangxun Li、Pingxian Liu、Xi Du、Qin Wang
DOI:10.1016/j.tetasy.2016.03.009
日期:2016.6
The excellent catalytic effect on methyl propiolate addition to a wide range of aromatic and aliphatic aldehydes promoted by inexpensive and commercially available BINOL-based ligand is reported. The catalyst systems showed high yields and excellent enantioselectivities for aromatic aldehydes, and excellent yields and high enantioselectivities for aliphatic aldehydes. (C) 2016 Elsevier Ltd. All rights reserved.
Synthesis of a C1 symmetric BINOL–terpyridine ligand and highly enantioselective methyl propiolate addition to aromatic aldehydes
作者:Xi Chen、Wei Chen、Li Wang、Xiao-Qi Yu、De-Shun Huang、Lin Pu
DOI:10.1016/j.tet.2010.01.058
日期:2010.3
catalyze the highlyenantioselective reaction (up to 98% ee) of methyl propiolate with a variety of aromatic aldehydes at 0 °C to give the synthetically useful γ-hydroxy-α,β-acetylenicesters. In comparison with the previously reported BINOL system, the use of (R)-5 requires a reduced amount of the chiral ligand without the addition of a Lewis base. It shows higher enantioselectivity for a number of
合成了一种新型的C 1对称BINOL-叔吡啶配体(R)-5。发现该配体与ZnEt 2和Ti(O i Pr)4结合可在0°C催化丙酸甲酯与各种芳香醛的高度对映选择性反应(最高ee达98%ee),从而得到可合成使用的γ-羟基-α,β-炔属酯。与先前报道的BINOL系统相比,(R)-5的使用需要减少量的手性配体而不添加路易斯碱。对于许多底物,它显示出更高的对映选择性。