Pd(II)-Catalyzed Synthesis of Alicyclic[<i>b</i>]-Fused Pyridines via C(sp<sup>2</sup>)–H Activation of <i>α,β</i>-Unsaturated <i>N</i>-Acetyl Hydrazones with Vinyl Azides
A new synthetic protocol for alicyclic[b]-fused pyridines with complete regioselectivity from α,β-unsaturated N-acetyl hydrazones and vinyl azides via Pd(II)-catalyzed C–H activation/cyclization/aromatization strategy has been described. A series of five- to eight-membered alicyclic[b]-fused pyridines were prepared in a one-step manner with wide substrate scope and good functional group tolerance.
已经描述了一种通过 Pd(II) 催化的 C-H 活化/环化/芳构化策略从α,β-不饱和N-乙酰腙和乙烯基叠氮化物具有完全区域选择性的脂环族[ b ]-稠合吡啶的新合成方案。一步法制备了一系列具有广泛底物范围和良好官能团耐受性的五至八元脂环[ b ]-稠合吡啶。
A photoannulation route to naphthalenes from cyclic ketones
作者:Robert J. Olsen、John C. Minniear、W. Mack Overton、John M. Sherrick
DOI:10.1021/jo00003a018
日期:1991.2
A three-step naphthalene annulation of cyclic ketones has been developed. Aldol condensation with an aromatic aldehyde followed by Wittig olefination produces a 1,3-diene, which undergoes oxidative photocyclization to produce a naphthalene derivative. Ketone ring sizes of C5 to C8 were annulated successfully. The sequence was also applied successfully to three methyl-substituted derivatives and one polycyclic case.
Direct Preparation of Monoarylidene Derivatives of Aldehydes and Enolizable Ketones with DIMCARB
作者:Ulf P. Kreher、Anthony E. Rosamilia、Colin L. Raston、Janet L. Scott、Christopher R. Strauss
DOI:10.1021/ol0351145
日期:2003.8.1
Aryl alpha,beta-unsaturated ketones and aldehydes were synthesized, in moderate to excellent yields, with use of dimethylammonium dimethyl carbamate (DIMCARB) as a recyclable reaction medium and as a catalyst.
OLSEN, ROBERT J.;MINNIEAR, JOHN C.;OVERTON, W. MACK;SHERRICK, JOHN M., J. ORG. CHEM., 56,(1991) N, C. 989-991
作者:OLSEN, ROBERT J.、MINNIEAR, JOHN C.、OVERTON, W. MACK、SHERRICK, JOHN M.