handled one-pot synthetic procedure was previously developed for the synthesis of bisphosphinates starting from acyl chlorides. Herein, other trivalent derivatives as acid anhydrides and activated esters were tested to form various bisphosphinates. This modulation of the reactivity can be controlled according to the nature of the acid derivative for the use of sensitive and functionalized substrates
Metal-free intermolecular C–O cross-coupling reactions: synthesis of N-hydroxyimide esters
作者:Yunhe Lv、Kai Sun、Weiya Pu、Shukuan Mao、Gang Li、Jiejie Niu、Qian Chen、Tingting Wang
DOI:10.1039/c6ra22653a
日期:——
Selectfluor-mediated intermolecular C–O crosscouplingreaction for the synthesis of N-hydroxyimide esters was developed for the first time. The reaction is applicable to the coupling of readily available aryl and alkyl aldehydes with N-hydroxyphthalimide (NHPI) and N-hydroxysuccinimide (NHSI). The resulting active esters can be directly converted into amides in onepot.
Cross-dehydrogenativecoupling (CDC) reactions of aldehydes with N-hydroxyimidates such as N-hydroxysuccinimide (NHSI), N-hydroxyphthalimide (NHPI) under catalyst-free conditions is described. Moreover, the desired products can be obtained simply by recrystallization from ethanol. This method is also applicable to the synthesis of amides in excellent yields. A radical mechanism of the type shown in
potent angiotensin-convertingenzyme (ACE) inhibitors, 1-(N2-substituted L-lysyl-gamma-D-glutamyl)octahydro-1H-indole-2-carboxylic acids, was synthesized; various acyl groups were introduced at the alpha-amino group of the N-terminal P1 Lys. The effect of the N2-acyl groups on in vitro inhibitory activity and oral antihypertensive effect was examined. All of the synthesized N-acyl tripeptides were found
FORMATION OF 18F AND 19F FLUOROARENES BEARING REACTIVE FUNCTIONALITIES
申请人:Carroll Michael Andrew
公开号:US20090286992A1
公开(公告)日:2009-11-19
An iodonium compound of formula (I):
where R
AR1
is a C
5-6
aryl group, bearing at least one substituent selected from formyl, thionoacyl, acylamidocarboxy, thionoester, azo, C
2-20
alkenyl, C
2-20
alkynyl, and (CH
2
)
n
R
C
, where R
C
is selected from ether, amino, azo and thioether;
R
AR2
is a C
5-10
aryl group, optionally substituted by one or more groups selected from C
1-12
alkyl, C
5-12
aryl, C
3-12
heterocyclyl, ether, thioether, nitro, cyano and halo, and may be linked to a solid support or fluorous tag; and
X is a counteranion.