asymmetric total synthesis of andranginine (1) via an asymmetric Morita–Baylis–Hillman reaction and a diastereoselective intramolecular Diels–Alder reaction has revealed that natural andranginine (1) isolated from Kopsia arborea existed as a scalemic mixture and contained predominantly the (16R,21S) form rather than the (16S,21R) form.
通过不对称Morita-Baylis-Hillman反应和非对映选择性分子内Diels-Alder反应的首次非对称全合成
锰丹宁(1)揭示,从Koppsia arborea分离出的天然丹丹宁(1)以鳞状混合物的形式存在,并且主要包含(16)R,21 S)形式而不是(16 S,21 R)形式。