An efficient diastereoselective approach to access (4R)-hydroxy-(2S)-substituted methyl ketones pyrroles skeleton 4a-s has been developed through Mannich process involving N,O-acetal 6 and ketones and propionaldehyde in excellent yield with high diastereoselectivity (dr up to 99:1). In addition, the utility of this convenient Mannich process is demonstrated by the diastereoselective synthesis of Tuv
一种有效的非对映选择性的方法来存取(4R) -羟基- (2S) -取代的甲基酮
吡咯骨架图4a-S已经通过曼尼希过程制定涉及N,O -acetal 6和在具有高非对映选择性优良收率酮和
丙醛(博士向上至99:1)。另外,Tuv片段(2)及其微管溶素V (1e)的类似物(18)的非对映选择性合成证明了这种方便的曼尼期法的实用性。