Gold Catalysis: Anellated Heterocycles and Dependency of the Reaction Pathway on the Tether Length
作者:A. Stephenâ K. Hashmi、Sreekumar Pankajakshan、Matthias Rudolph、Elisabeth Enns、Thomas Bander、Frank Rominger、Wolfgang Frey
DOI:10.1002/adsc.200900614
日期:2009.11
atoms in the tether between the arylalkynylamide and the furan subunits, the formation of benzoanellated heterocycles was observed, a number of interesting heterocyclic framworks could be accessed in this way. With three carbon atoms in the tether, the outcome was quite different, cyclopentadiene derivatives anellated to tetrahydropyridine rings were isolated. The two different pathways suggested are
formation of angular carbocycles via a gold(I)-catalyzed dehydro Diels-Alder reaction. This transformation provides rapid access to a variety of complex angular cores in excellent diastereoselectivities and high yields. The usefulness of this AuI -catalyzed cycloaddition was further demonstrated by accomplishing a 11-steps total synthesis of (±)-magellanine.
Regioselective Transformation of Long π-Conjugated Backbones: From Oligofurans to Oligoarenes
作者:Sunita Gadakh、Linda J. W. Shimon、Ori Gidron
DOI:10.1002/anie.201705914
日期:2017.10.23
through the formation of up to 12 new C−C bonds. The versatility of this method was demonstrated for various polyaromatic hydrocarbons. The regioselectivity of this process enabled the synthesis of a library of substituted triarylenes from a single terfuran precursor by modification of the dienophile strength and the order of addition. Overall, this study demonstrates that long oligofurans are interesting
[EN] AN APPROACH TO A BOTTOM-UP SYNTHESIS OF NANOCARBONS<br/>[FR] APPROCHE D'UNE SYNTHÈSE ASCENDANTE DE NANOCARBONES
申请人:YISSUM RES DEV CO OF HEBREW UNIV JERUSALEM LTD
公开号:WO2018220634A1
公开(公告)日:2018-12-06
The invention generally provides a method for the synthesis of a π-conjugated system from oligofurans, under conditions involving cycloaddition.
这项发明通常提供了一种从寡呋合物合成π共轭系统的方法,涉及环加成条件。
Synthesis of Hexa(furan-2-yl)benzenes and Their π-Extended Derivatives
作者:Koichi Mitsudo、Jyunji Harada、Yo Tanaka、Hiroki Mandai、Chie Nishioka、Hideo Tanaka、Atsushi Wakamiya、Yasujiro Murata、Seiji Suga
DOI:10.1021/jo302652r
日期:2013.3.15
The first synthesis of hexa(furan-2-yl)benzene derivatives is described. The RhCl3/i-Pr2NEt-catalyzed cyclotrimerization of di(furan-2-yl)acetylenes was an effective method for constructing hexa(furan-2-yl)benzene derivatives in good yields. Their π-extended derivatives were also synthesized by Suzuki–Miyaura coupling between hexakis(5-Bpinfuran-2-yl)benzene (Bpin = (pinacolato)boryl) and several aryl
描述了六(呋喃-2-基)苯衍生物的第一次合成。RhCl 3 / i -Pr 2 NEt催化的二(呋喃-2-基)乙炔环三聚反应是一种高效制备六(呋喃-2-基)苯衍生物的有效方法。它们的π延伸衍生物也通过Suzuki-Miyaura在六(5-Bfurfuran-2-yl)苯(Bpin =(频哪醇)硼烷基)和几种芳基碘化物之间的偶联而合成。