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view source for transfer hydrogenation wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in view source for transfer hydrogenation add languages article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file page information get shortened url switch to legacy parser in other projects wikidata item appearance move to sidebar hide transfer hydrogenation you do not have permission to edit this page for the following reason this ip address range has been globally blocked this does not affect your ability to read wikipedia pages most people who see this message have done nothing wrong some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism and can sometimes affect other users who are unrelated to that abuse review the information below for assistance if you do not believe that you have done anything wrong this block affects editing on all wikimedia wikis the ip address or range 5 135 0 0 16 has been globally blocked by jon kolbert for the following reason s open proxy webhost visit the faq if you are affected this block will expire on 04 29 8 january 2027 your current ip address is 5 135 42 194 even while globally blocked you will usually still be able to edit pages on meta wiki if you believe you were blocked by mistake you can find additional information and instructions in the stewards block wizard other useful links global blocks help i have been blocked you can view and copy the source of this page organocatalytic transfer hydrogenation organocatalytic transfer hydrogenation has been described by the group of list in 2004 in a system with a hantzsch ester as hydride donor and an amine catalyst ref cite journal author1 yang first2 m first3 b title a metal free transfer hydrogenation organocatalytic conjugate reduction of alpha beta unsaturated aldehydes journal angewandte chemie international edition in english volume 43 issue 48 pages 6660 6662 year 2004 pmid 15540245 doi 10 1002 anie 200461816 last2 hechavarria fonseca last3 list doi access free ref image organocatalytictransferhydrogenation svg class skin invert image 600px organocatalytic transfer hydrogenation yang 2004 in this particular reaction the substrate is an carbonyl ce b1 2c ce b2 unsaturated carbonyl compounds α β unsaturated carbonyl compound the proton donor is oxidized to the pyridine form and resembles the biochemically relevant coenzyme nadh in the catalytic cycle for this reaction the amine and the aldehyde first form an iminium ion then proton transfer is followed by hydrolysis of the iminium bond regenerating the catalyst by adopting a chiral imidazolidinone macmillan organocatalyst an enantioselectivity of 81 enantiomeric excess ee was obtained image asymmetricorganocatalytictransferhydrogenation svg class skin invert image 600px asymmetric organocatalytic transfer hydrogenation yang 2004 ref cite journal author1 ouellet first2 j first3 d title enantioselective organocatalytic hydride reduction journal journal of the american chemical society volume 127 issue 1 pages 32 33 year 2005 pmid 15631434 doi 10 1021 ja043834g last2 tuttle last3 macmillan bibcode 2005jachs 127 32o ref image macmillanasymmetricorganocatalytictransferhydrogenation svg class skin invert image 600px macmillan asymmetric organocatalytic transfer hydrogenation in a case of stereoconvergence both the e isomer and the z isomer in this reaction yield the s enantiomer extending the scope of this reaction towards ketone s or rather enone s requires fine tuning of the catalyst add a benzyl group and replace the t butyl group by a furan and of the hantzsch ester add more bulky t butyl groups ref cite journal author1 tuttle first2 s first3 d title organocatalytic transfer hydrogenation of cyclic enones journal journal of the american chemical society volume 128 issue 39 pages 12662 12663 year 2006 pmid 17002356 doi 10 1021 ja0653066 last2 ouellet last3 macmillan bibcode 2006jachs 12812662t s2cid 12456921 url https authors library caltech edu 76999 2 ja0653066si20060829_010015 pdf ref image organocatalytictransferhydrogenationenones svg class skin invert image 500px organocatalytic transfer hydrogenation enones tuttle 2006 with another organocatalyst altogether hydrogenation can also be accomplished for imine s one cascade reaction is catalyzed by a chiral phosphoric acid ref cite journal author1 rueping first2 a first3 t title a highly enantioselective brønsted acid catalyzed cascade reaction organocatalytic transfer hydrogenation of quinolines and their application in the synthesis of alkaloids journal angewandte chemie international edition in english volume 45 issue 22 pages 3683 3686 year 2006 pmid 16639754 doi 10 1002 anie 200600191 last2 antonchick last3 theissmann ref image transferhydrogenationiminereduction svg class skin invert image 600px transfer hydrogenation imine reduction rueping 2006 the reaction proceeds via a chiral iminium ion traditional metal based catalysts hydrogenation of aromatic or heteroaromatic substrates tend to fail return to transfer hydrogenation retrieved from https en wikipedia org wiki transfer_hydrogenation privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search view source for transfer hydrogenation add languages add topic