Diastereoselective, Titanium-Mediated Cyclization of ω-Vinyl Tethered Imides
作者:Soumava Santra、Nikolai Masalov、Oleg L. Epstein、Jin Kun Cha
DOI:10.1021/ol0525157
日期:2005.12.1
[reaction: see text] Diastereoselective reductive coupling reactions of omega-vinyl tethered cyclic imides are achieved by a preexisting stereocenter at an allylic position. Particularly noteworthy is the effective use of a 1:2 mixture of Ti(O-i-Pr)4 and n-BuLi to afford the N-acylhemiaminal products in good yields.
2-azonia-Cope rearrangement in N-acyliminium cyclizations
作者:Hugo Ent、Henk De Koning、W. Nico Speckamp
DOI:10.1021/jo00360a011
日期:1986.5
ENT, H.;DE, KONING, H.;SPECKAMP, W. N., TETRAHEDRON LETT., 1983, 24, N 20, 2109-2112
作者:ENT, H.、DE, KONING, H.、SPECKAMP, W. N.
DOI:——
日期:——
ENT, H.;DE, KONING, H.;SPECKAMP, W. N., J. ORG. CHEM., 1986, 51, N 10, 1687-1691
作者:ENT, H.、DE, KONING, H.、SPECKAMP, W. N.
DOI:——
日期:——
The 2-aza-cope N-acyliminium cyclization
作者:Hugo Ent、Henk de Koning、W.Nico Speckamp
DOI:10.1016/s0040-4039(00)81857-2
日期:1983.1
The 2-aza-Cope N-acyliminium ring closure is shown to proceed in a stereoselective fashion via the primary N-acyliminium intermediate . The latter ion can also be generated from the open hydroxymethyllactam .