[3+2] Cycloaddition of alkynes to resin bound nitrile oxides gives after cleavage of 3,4,5trisubstitutedisoxazoles in acceptable yields and fair to good purity, depending on the alkyne substituents. The reaction has been automated on the ACT 496 synthesiser.
1,2-Benzisothiazole 1,1-dioxide: a convenient synthesis. The question of the possible aromaticity of 1,2-benzothiazepine 1,1-dioxides
作者:Rudolph A. Abramovitch、Babu Mavunkel、James R. Stowers
DOI:10.1039/c39830000520
日期:——
A convenientsynthesis of 1,2-benzisothiazole1,1-dioxide from toluene-o-sulphonamide is reported, and this allows the preparation of a number of 1,2-benzothiazepine1,1-dioxides bearing hydrogen atoms in the seven-membered ring; 1H n.m.r. spectroscopy suggests that the later is not aromatic.
据报道,由甲苯-邻-磺酰胺可方便地合成1,2-苯并噻唑1,1-二氧化物,这使得可以制备许多在七元中带有氢原子的1,2-苯并噻唑烷1,1-二氧化物。戒指; 1 H nmr光谱表明后者不是芳香族的。
A study of the reactivity of tricarbonyl(vinylketene)iron(0) complexes towards alkynes
作者:K.Gail Morris、Stephen P. Saberi、Matthew M. Salter、Susan E. Thomas、Mark F. Ward、Alexandra M.Z. Slawin、David J. Williams
DOI:10.1016/s0040-4020(01)87272-0
日期:1993.1
Alkynes add to tricarbonyl(vinylketene)iron(0) complexes to generate stable 1:1 adducts, the structures of which were determined by an X-ray crystal structure analysis of the adduct formed from tricarbonyl(5-phenyl-3-iso-propyl-1-oxapenta-1,2,4-triene)iron(0) and dimethyl acetylenedicarboxylate. Addition of unsymmetrical alkynes is regioselective and the regiochemistries of the adducts isolated from
Reaktionen von carbonylcyclopentadienylhydriden von molybdän und wolfram mit α-aminoacetylenen.II
作者:Harald Brix、Wolfgang Beck
DOI:10.1016/s0022-328x(00)85852-0
日期:1982.8
Insertion of α-aminoacetylenes R1CCNR22 into the metal hydrogen bond of the complexes (η5-L)(η1-L)(CO)2MH (M Mo,W; η5-L C5H5, MeC5H4, indenyl; η1-L CO, phosphite) gives η1-aminovinyl complexes (III) which could be iso lated with η1-L phosphite. CO insertion into the metalvinyl bond yields the η3-acryloyl complexes (IV), which isomerize at higher temperatures for M W and R1 Me, Me3Si;