STERO CONTROLLED SYNTHESIS OF (E,Z)-DIENALS VIA TANDEM RH(I) CATALYZED PROPARGYL CLAISEN REARRANGEMENT
申请人:The Florida State University Research Foundation, Inc.
公开号:US20150361019A1
公开(公告)日:2015-12-17
A novel Rh(I)-catalyzed approach to synthesizing functionalized (E,Z) dienal compounds has been developed via tandem transformation where a stereoselective hydrogen transfer follows a propargyl Claisen rearrangement. Z-Stereochemistry of the first double bond suggests the involvement of a six-membered cyclic intermediate whereas the E-stereochemistry of the second double bond stems from the subsequent protodemetallation step giving an (E,Z)-dienal. The reaction may be represented by the following sequence.
已经开发出一种新颖的Rh(I)催化方法,用于合成功能化的(E,Z)二烯醛化合物,通过串联转化,其中立体选择性的氢转移跟随着一个炔丙基Claisen重排。第一个双键的Z-立体化学表明涉及一个六元环中间体,而第二个双键的E-立体化学源自随后的脱金属化步骤,形成一个(E,Z)-二烯醛。该反应可以用以下序列表示。