(3 + 2)-Cycloaddition of Donor–Acceptor Cyclopropanes with Selenocyanate: Synthesis of Dihydroselenophenes and Selenophenes
作者:Anu Jacob、Peter G. Jones、Daniel B. Werz
DOI:10.1021/acs.orglett.0c03329
日期:2020.11.6
We present a Lewis-acid-catalyzed (3 + 2)-cycloaddition of donor–acceptor cyclopropanes and selenocyanate (as its tetramethylammonium salt) for the synthesis of dihydroselenophenes. The transformation proceeded with moderate to excellent yields and showed a high functional group tolerance. Further oxidation using DDQ delivered selenophenes.
The combination of tetraalkylammonium halides (Cl−, Br−) and m-chloroperbenzoicacid in CH3CN effectively halogenated alkanes accompanied by the formation of alkyl m-chlorobenzoate; for which the alkyl halides were formed via a non-photoinduced radical mechanism and the esters were derived from a non-radical process and concomitant with the formation of corresponding trialkylamine.
CpMn(CO)2ER (E = S, Se) compounds [1] belong to the rare radical derivatives of the CpMn(CO)2 fragment. We describe herein the syntheses, electrochemistry, and organometallicreactions of Cp★Mn(CO)2SR 1 (1a: R = t-C4H9, 1b: R = 2-adamantyl) and CpM(CO)2SePh (2).
The present disclosure provides a single-side modified β-Anderson-type heteropolymolybdate organic derivative having an anionic moiety with a general formula represented by: β-[RC(CH
2
O)
3
]M(OH)
3
Mo
6
O
18
}
3−
; β represents a non-planar folded structure; R=substituted or unsubstituted phenyl, C
n
H
2n
X (n is an integer from 0 to 22; X=H, OH, NH(CH
2
)
3
SO
3
H, NHCH
2
COOH, NH
2
, or NO
2
); M=Cr
3+
. The single-side modified β-Anderson-type heteropolymolybdate organic derivative can be prepared under hydrothermal conditions.
本公开提供了一种具有阴离子基团的单面修饰的β-安德森型杂多钼酸盐有机衍生物,其一般表示为:β-[RC(CH
2
O)
3
]M(OH)
3
Mo
6
O
18
}
3−
;β代表非平面折叠结构;R=取代或未取代的苯基,C
n
H
2n
X(n为0至22的整数;X=H、OH、NH(CH
2
)
3
SO
3
H、NHCH
2
COOH、NH
2
或NO
2
);M=Cr
3+
。这种单面修饰的β-安德森型杂多钼酸盐有机衍生物可在水热条件下制备。
Unprecedented χ isomers of single-side triol-functionalized Anderson polyoxometalates and their proton-controlled isomer transformation
A series of unprecedented χ isomers of the triol functionalized organic–inorganic hybrids was obtained by regioselective activation of the μ2-O atom in the Anderson cluster and proton-controlled isomer transformation between δ and χ isomers was observed.