Enantio- and Diastereoselective Synthesis of Highly Substituted Benzazepines by a Multicomponent Strategy Coupled with Organocatalytic and Enzymatic Procedures
have been assembled by convergent strategy with a good control of diastereoselectivity. The two steps are as follows: an asymmetric organocatalytic Mannich reaction performed on Boc-imines of o-(azidomethyl)benzaldehydes, followed by a one-pot Staudinger/aza-Wittig/Ugi–Joullié sequence. The latter reaction represents one of the first examples of diastereoselective Ugi three-component reaction on a
对映体纯的4,5-二氢-1 H-苯并[ c ]氮杂环庚烷具有三个连续的立体生成中心,已通过收敛策略与非对映选择性的良好控制进行了组装。这两个步骤如下:对邻(叠氮甲基)苯甲醛的Boc-亚胺进行不对称的有机催化曼尼希反应,然后进行一锅Staudinger / aza-Wittig /Ugi-Joullié序列。后一反应代表在七元环亚胺上的非对映选择性Ugi三组分反应的第一个例子。该Ø -azidomethylbenzaldehydes已被合成采用自市售积木一个简单而有效的酶法策略。