62559-36-8Relevant articles and documents
Acceleration of hetero-Michael reaction by symmetrical pentacyclic guanidines
Nagasawa, Kazuo,Georgieva, Angelina,Takahashi, Hiroki,Nakata, Tadashi
, p. 8959 - 8964 (2007/10/03)
Symmetrical pentacyclic guanidines 1a-c and 2 which contain the core skeleton of 13,14,15-isocrmbescidine 800, have been synthesized. In the presence of catalytic amounts of these guanidines 1, the reaction rate of the conjugate addition of pyrrolidine (9) to γ-crotonolactone (10) could be enhanced depending upon the size of the cavities and substituents on tetrahydropyran rings of 1 and 2.
Ring opening of 1,5-dioxaspiro[3.2]hexanes: Selective preparation of α-heterofunctionalized-β′-hydroxy ketones or 2,2-disubstituted oxetanes
Howell, Amy R.,Ndakala, Albert J.
, p. 825 - 827 (2008/02/09)
(equation presented) 2-Methyleneoxetanes have been converted into 1,5-dioxaspiro[3.2]hexanes with dimethyldioxirane. Reaction of the dioxaspirohexanes with a range of heteroatom nucleophiles, hydride donors, or organoaluminum reagents was successful under
THE DIMESITYLBORON GROUP IN ORGANIC SYNTHESIS 8. PREPARATION OF 1,3-DIOLS FROM OXIRANES
Pelter, Andrew,Bugden, Gina,Rosser, Richard
, p. 5097 - 5100 (2007/10/02)
Alkyldimesitylboranes, yield anions, Mes2BCHR, that on reaction with oxiranes followed by oxidation give 1,3-diols.These anions are thus the operational equivalent of RCHOH.The scope and limitations of the new process are delineated.