Hydrogenation is one of the most fundamental transformations in organic synthesis, and its industrial applications span from fine chemicals to pharmaceuticals synthesis. 1− 3 Direct hydrogenation with a pressure of H2 gas and transfer hydrogenation (TH) are the two employed strategies for hydrogenation. TH reaction, referring to the addition of hydrogen to a molecule from a non-H2 hydrogen source, is a convenient and powerful method to access various hydrogenated compounds. It is an attractive alternative to direct hydrogenation, and it has recently become the center of research in hydrogenation science. The reasons for that are (i) the TH method does not require eventually hazardous pressurized H2 gas nor elaborate experimental setups,(ii) the hydrogen donors are readily available, inexpensive, and easy to handle,(iii) the major side product can be recycled, and (iv) the catalysts that are involved usually are readily accessible and not sensitive. 4− 14