His achievements have been recognized by a variety of U.S. and international fellowships. He was a Camille and Henry Dreyfus Teacher Scholar, a Fellow of the Alfred P. Sloan Foundation, the von Humboldt Foundation U.S. Senior Scientist in 1981, an Erskine Fellow in New Zealand in 1993, the Lady Davis Fellow at the Technion in Haifa, Israel in 2000, and a JSPS Fellow in Japan in 2001. He was elected to the American Academy of Arts and Sciences in 2002 and the International Academy of Quantum Molecular Sciences in 2003. He is a Fellow of the AAAS, the ACS, and the WATOC. He was named Saul Winstein Chair in Organic Chemistry in 2009 at UCLA. He was elected a member of the National Academy of Sciences in 2010.