Rhenium-Catalyzed 1,3-Isomerization of Allylic Alcohols: Scope and Chirality Transfer
作者:Christie Morrill、Gregory L. Beutner、Robert H. Grubbs
DOI:10.1021/jo061436l
日期:2006.9.1
The scope of the triphenylsilyl perrhennate (O3ReOSiPh3, 1) catalyzed 1,3-isomerization of allylicalcohols has been thoroughly explored. It was found to be effective for a wide variety of secondary and tertiary allylicalcohol substrates bearing aryl, alkyl, and cyano substituents. Two general reaction types were found which gave high levels of product selectivity: those driven by formation of an
stereoselective domino Rauhut–Currier/Michael addition process of 3-benzofuranyl vinyl ketones and 3-olefinic (7-aza)oxindoles can be realised via catalysis by a chiral bifunctional phosphine, furnishing the previously unreported direct asymmetric dearomative reaction of benzofuran substrates tethered to a carbonyl group in a formal [4+2] cycloaddition manner. An array of hydrodibenzofuran derivatives with dense
Part 2. Notch-sparing γ-secretase inhibitors: The study of novel γ-amino naphthyl alcohols
作者:Han-Xun Wei、Dai Lu、Vivien Sun、Jing Zhang、Yongli Gu、Pamela Osenkowski、Wenjuan Ye、Dennis J. Selkoe、Michael S. Wolfe、Corinne E. Augelli-Szafran
DOI:10.1016/j.bmcl.2016.03.042
日期:2016.5
the amyloid precursor protein (APP) by γ-secretase. At the beginning of a series of studies from our laboratories, a series of novel γ-amino alcohols (1) were found to possess γ-secretase inhibitory activity and Notch-sparing effects. A new one-pot synthesis of γ-amino alcohols and the structure–activity relationship (SAR) of these analogs will be discussed.
A manganese-catalyzed ring-opening coupling reaction of cyclopropanols with enones for the facile and efficient preparation of 1,6-diketones is described. A wide array of synthetically important 1,6-diketones bearing manifold functional groups are obtained with up to 93% yield. These reactions feature broad substrate scopes, environmentally benign conditions, inexpensive catalyst, and operational simplicity
strategically novel Pd-catalyzed nucleophilic addition induced allylic alkylation reaction (NAAA) of allenoates has been successfully accomplished. By judiciously integrating ZnCl2-promoted Michael addition with Pd-catalyzed allylic alkylation, allenoates readily undergo allyl-sunfonylation at the internaldoublebond, thus providing a straightforward avenue for the rapid assembly of a host of structurally