Jens Ahman
Massachusetts Institute of Technology
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Jens Ahman.
Tetrahedron Letters | 1997
John P. Wolfe; Jens Ahman; Joseph P. Sadighi; Robert A. Singer; Stephen L. Buchwald
Abstract Commercially available benzophenone imine serves as a convenient ammonia equivalent in the palladium-catalyzed amination of aryl halides and triflates. The benzophenone imine adducts can be cleaved directly to the corresponding primary anilines by catalytic hydrogenation or treatment with hydroxylamine hydrochloride or a catalytic amount of HCl in wet THF.
Tetrahedron Letters | 1992
Peter Somfai; Jens Ahman
Abstract A short and enantioselective total synthesis of the neurotoxic alkaloid (+)-Anatoxin-a ( 1 ) from the L-pyroglutamic acid derivative 2 is described. The key step involves an intramolecular cyclisation of an N-tosyl iminium ion derived from the corresponding α-methoxy sulfonamide.
Synthetic Communications | 1994
Jens Ahman; Peter Somfai
Abstract A mild and efficient procedure for N-alkylation of 2,3-trans-disubstituted aziridines by using K2CO3/18-crown-6 as base is described.
Journal of The Chemical Society, Chemical Communications | 1994
Jens Ahman; Peter Somfai; David Tanner
The thermal 1,5-hydrogen shift of the enantiomerically pure vinyl aziridines 1 yields allylic imines 3 in quantitative yields and as single diastereomers.
Journal of The Chemical Society-perkin Transactions 1 | 1994
Jens Ahman; Peter Somfai
Cyclic N-sulfonylenamines can be prepared under mild conditions from the corresponding lactams by an efficient two-step procedure involving diisobutylaluminium hydride (DIBAL) or LiAIH4 reduction followed by CF3CO2H induced dehydration. In addition, appropriately substituted N-sulfonylenamines are substrates in intramolecular radical cyclizations, forming the corresponding spirocyclic sulfonamides in good yields.
Journal of the American Chemical Society | 1998
Jens Ahman; John P. Wolfe; Malisa V. Troutman; Michael Palucki; Stephen L. Buchwald
Journal of the American Chemical Society | 2002
Takayuki Hamada; Andre Chieffi; Jens Ahman; Stephen L. Buchwald
Organic Letters | 2001
Andre Chieffi; Ken Kamikawa; Jens Ahman; Joseph M. Fox; Stephen L. Buchwald
Tetrahedron Letters | 1997
Jens Ahman; Stephen L. Buchwald
Archive | 1999
Stephen L. Buchwald; David W. Old; John P. Wolfe; Michael Palucki; Ken Kamikawa; Andrew Chieffi; Joseph P. Sadighi; Robert A. Singer; Jens Ahman