to overcome safety and scalability problems with existing procedures. The sterically hindered quaternary, neopentyl stereocenter was formed in high diastereoselectivity by the addition of a carbamoyl anion to an N-sulfinyl ketimine. An aryl nitrile was installed by a palladium- and cyanide-free electrophilic cyanation affected by transnitrilation of an arylmagnesium derivative with dimethylmalononitrile
描述了两种β位淀粉样蛋白前体蛋白裂解酶 (
BACE)
抑制剂的大规模合成的发展。发现了新的方法来克服现有程序的安全性和可扩展性问题。通过将
氨基甲酰基阴离子添加到N-亚磺酰基酮
亚胺,以高非对映选择性形成空间位阻季新戊基立构中心。芳基腈是通过不含
钯和
氰化物的亲电
氰化反应安装的,该
氰化反应受芳基
镁衍
生物与二甲基
丙二腈的转腈作用影响。基于
丙二酸二乙酯和
二苄胺起始原料,设计了一条通往氧杂
环丁基甲基胺侧链的安全路线。开发了一种温和的烯胺
氟化反应,用于合成
氟代
异丁胺侧链。