Enantiocontrolled construction of bicyclic proline derivatives via one-pot generation and intramolecular trapping of chiral stabilised azomethine ylids
摘要:
Aldehydes possessing unsaturation at C-5 or C-6 condense with (5S)-phenylmorpholin-2-one (1), generating chiral stabilised azomethine ylids which undergo concommitant diastereospecific intramolecular 3+2 dipolar cycloaddition to furnish adducts (2), (4), and (5) which may be converted to homochiral bicyclic proline derivatives. Reductive desulfurisation of the thioether derivative (5) leads to (2S,4R,5R)-4,5-dimethylproline (7).
Fast Ruthenium-Catalysed Allylation of Thiols by Using Allyl Alcohols as Substrates
作者:Alexey B. Zaitsev、Helen F. Caldwell、Paul S. Pregosin、Luis F. Veiros
DOI:10.1002/chem.200900192
日期:2009.6.22
Green and fast: Allylation of aromatic and aliphatic thiols, by usingallylalcohols as substrates, requires only minutes at ambient temperature with a Ru catalyst (see scheme). Quantitative conversion is normal and the catalyst possesses high functional‐group tolerance.
Highly efficient catalytic dehydrative S-allylation of thiols and thioic S-acids
作者:Shinji Tanaka、Prasun Kanti Pradhan、Yusuke Maegawa、Masato Kitamura
DOI:10.1039/c0cc00096e
日期:——
A SH-selective allylation method using [CpRu(2-quinolinecarboxylato)(η3-C3H5)]PF6 has been realized in various solvents including aqueous media to give allyl sulfides and allyl S-thioates, demonstrating the potential applicability to lipopeptide chemistry.
Allene chemistry. VIII. Diaddition of thiol compounds to allene
作者:Alexis A. Oswald、Karl Griesbaum、Daniel N. Hall、Walter Naegele
DOI:10.1139/v67-196
日期:1967.6.1
types of thiol compounds differ widely in their reactivity towards allene. A comparison of the data for t-butane- and benzene-thiol addition suggests that, in general, the amount of branched diadducts from monoadditions is directly proportional to the hydrogen-donor ability of the thiol, and that the amount of the allylic monoadduct formed is proportional to the stability of the thiyl radical.
Catalytic Activation of Diazo Compounds Using Electron-Rich, Defined Iron Complexes for Carbene-Transfer Reactions
作者:Michael S. Holzwarth、Isabel Alt、Bernd Plietker
DOI:10.1002/anie.201201409
日期:2012.5.29
transfer: The electron‐rich iron complex Bu4N[Fe(CO)3(NO)] efficientlycatalyzes different carbene‐transfer reactions. Various diazo compounds can be used. The high stability of the employed iron complexes is demonstrated by the generation of the diazo reagent in situ and a sequential iron‐catalyzed allylic sulfenylation/Doyle–Kirmse reaction.
碳转移:富电子的铁络合物Bu 4 N [Fe(CO)3(NO)]有效催化不同的卡宾转移反应。可以使用各种重氮化合物。重氮试剂的原位生成和连续的铁催化的烯丙基亚磺酰化/道尔-柯尔姆斯反应证明了所用铁配合物的高稳定性。
Reaction of selenium dihalides with 2-(allylsulfanyl)ethanol
作者:M. V. Musalov、R. S. Ishigeev、V. A. Potapov、S. V. Amosova
DOI:10.1134/s1070428016100304
日期:2016.10
benzo-fused selenium heterocycles by reactions of selenium dihalides with allyl and propargyl phenyl ethers [5, 6]. Selenocyclofunctionalization reactions with selenium dihalides are also possible [7, 8]. Until present, compounds containing an allylsulfanyl group were rarely used in selenocyclofunctionalization reactions [1]. There are no published data on reactions of 2-(allylsulfanyl)ethanol (1) with