通过对苯二酚基伯胺催化剂催化环庚酮和环辛酮与硝基二烯和硝基烯烃的有机催化迈克尔反应。(高达> 100以良好的收率(高达88%)的良好至优异的非对映选择性得到相应的迈克尔加成物:1)和对映选择性(高达> 99%ee)的。通过ECD光谱的TDDFT模拟来分配Michael产品的绝对配置。并且迈克尔产物可以容易地转化成环烷[ b ]稠合的吡咯烷的类似物。
The highly enantioselective Michael addition of ketones to nitrodienes catalyzed by the efficient organocatalyst system of pyrrolidinyl-thioimidazole and chiral thioureido acid
The highlyenantioselectiveMichaeladdition reaction of ketones to nitrodienes was promoted efficiently by the accessible and fine-tunable organocatalytic system of pyrrolidinyl-thioimidazole and chiral thioureido acid. The corresponding adducts were afforded in good yields with high diastereoselectivities (up to 99 : 1) and excellent enantioselectivities (up to 99% ee).
An organocatalytic Michael reaction of cycloheptanone and cyclooctanone with nitrodienes and nitroolefins catalyzed by a hydroquinine-based primary amine catalyst has been accomplished. The corresponding Michael adducts were obtained in good yields (up to 88%) with good to excellent diastereoselectivities (up to >100:1) and enantioselectivities (up to >99% ee). The absolute configuration of the Michael
通过对苯二酚基伯胺催化剂催化环庚酮和环辛酮与硝基二烯和硝基烯烃的有机催化迈克尔反应。(高达> 100以良好的收率(高达88%)的良好至优异的非对映选择性得到相应的迈克尔加成物:1)和对映选择性(高达> 99%ee)的。通过ECD光谱的TDDFT模拟来分配Michael产品的绝对配置。并且迈克尔产物可以容易地转化成环烷[ b ]稠合的吡咯烷的类似物。