Stereoselectivity of Four (R)-Selective Transaminases for the Asymmetric Amination of Ketones
作者:Francesco G. Mutti、Christine S. Fuchs、Desiree Pressnitz、Johann H. Sattler、Wolfgang Kroutil
DOI:10.1002/adsc.201100558
日期:2011.11
Four (R)-ω-transaminases originating from Hyphomonas neptunium (HN-ωTA), Aspergillus terreus (AT-ωTA) and Arthrobacter sp. (ArR-ωTA), as well as an evolved transaminase (ArRmut11-ωTA) were successfully employed for the amination of prochiral ketones leading to optically pure (R)-amines. The first three transaminases displayed perfect stereoselectivity for the amination of all substrates tested (ee
来源于海豚Hy(HN-ωTA),土曲霉(AT-ωTA)和节杆菌属的四种(R)-ω-转氨酶。(ArR-ωTA)以及进化的转氨酶(ArRmut11-ωTA)已成功用于手性酮的胺化,从而生成了光学纯的(R)-胺。前三个转氨酶对所有测试底物的胺化显示出完美的立体选择性(ee > 99%)。此外,在大多数情况下,转氨酶AT-ωTA的转化率比使用D-丙氨酸作为胺供体的ArR-ωTA和HN-ωTA更好。α-四氢萘酮是HN-ωTA,ArR-ωTA和AT-ωTA唯一不被接受的底物,已成功转化为具有理想的对映选择性(ee > 99%)转化为相应的光学纯胺(采用变体ArRmut11-ωTA)。