Synthesis of Different Deuterated Carboxylic Acids from Unsaturated Acids Promoted by Samarium Diiodide and D2O
摘要:
An easy, and rapid reduction of the C=C bond of alpha,beta-unsaturated acids by means of samarium diiodide in the presence of D2O provides an efficient method for synthesizing 2,3-dideuterio acids. Starting from alka-2,4-dienoic acids, (E)-alpha,delta-dideuterio-betagamma-unsaturated acids are obtained, the new C=C bond being generated with complete diastereoselectivity. When H2O is used instead of D2O, saturated carboxylic acids and (E)-beta,gamma-unsaturated acids are isolated. A mechanism to explain each synthesis has been proposed.
A synthetically benign deuterium atom transfer (DAT) deuteration of electron-deficient alkenes has been achieved. This DAT protocol realized higher functional group (FG) tolerance and chemoselectivity than the existing method, and allowed access to complex deuterated compounds including a heavy drug and deuterium-labeled amino acids.
已经实现了缺电子烯烃的合成良性氘原子转移 (DAT) 氘化。该 DAT 协议实现了比现有方法更高的官能团 (FG) 耐受性和化学选择性,并允许获得复杂的氘化化合物,包括重药物和氘标记的氨基酸。
Somasekharan, K. N.; Kiefer, Edgar F., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 29 - 37