Mild Base Promoted Nucleophilic Substitution of Unactivated
<i>sp</i>
<sup>3</sup>
‐Carbon Electrophiles with Alkenylboronic Acids
作者:Shiwen Liu、Xiaojun Zeng、Gerald B. Hammond、Bo Xu
DOI:10.1002/adsc.201800826
日期:2018.10.4
Diverse alkenylboronic acids react smoothly with various sp3‐carbon electrophiles such as unactivated alkyl triflates in the presence of mild bases such as K3PO4. The reaction protocol is very mild and thereby enables high functional group tolerance. This transition metal‐free condition is orthogonal towards the classic transition metal catalyzed Suzuki coupling.
在温和的碱(例如K 3 PO 4)存在下,不同的烯基硼酸与各种sp 3-碳亲电试剂(例如未活化的烷基三氟甲磺酸酯)平滑反应。反应方案非常温和,因此可以实现较高的官能团耐受性。这种无过渡金属的条件与经典的过渡金属催化的Suzuki偶联正交。
Expeditious Microwave-Assisted Synthesis of 5-Alkoxyoxazoles from α-Triflyloxy Esters and Nitriles
A rapid and general access to diversely substituted 5-alkoxyoxazoles 2 (i.e., R1, R2 = alkyl, phenyl) from easily accessible α-triflyloxy/hydroxy esters 1 and nitriles with good yields (41–76%) is reported. The versatility of the cyclization is shown for a range of substrates with high selectivity toward triflates over mesylates and proved to be compatible with sensitive functional groups. As an illustration
LIPOPHILIC MACROCYCLIC LIGANDS, COMPLEXES THEREOF, AND USES OF SAME
申请人:GUERBET
公开号:US20200231554A1
公开(公告)日:2020-07-23
The present invention relates to novel lipophilic macrocyclic ligands, the complexes thereof, in particular radioactive complexes, and the uses of same in medical imaging and/or in therapy, in particular in interventional radiology.
CARBOXYLIC DERIVATIVES FOR USE IN THE TREATMENT OF CANCER
申请人:Aymami Bofarull Juan
公开号:US20110105544A1
公开(公告)日:2011-05-05
The invention provides novel compounds of formula (I), wherein: R
1
is a radical derived from one of the known ring systems; R
2
is a phenyl radical optionally substituted; X
n
represents a birradical selected from the group consisting of: —(CH
2
)
1-4
—, (C
2
-C
4
)-alkenyl, (C
2
-C
4
)alkynyl, —S—(CH
2
)
1-3
—#, and —(CH
2
)
1-3
—O—#; wherein the symbol # indicates the position at which X
n
is attached to R
1
; Y
n
is a birradical selected from the group consisting of: —(CH
2
)
2-4
—, —S—(CH
2
)
1-3
#, and —O—(CH
2
)
1-3
—#; wherein the symbol # indicates the position at which Y
n
is attached to R
2
; and R
3
is a radical selected from the group consisting of: —OR
4
. The compounds of formula (I) are useful in the treatment of cancer.
Sustainable Synthesis of α‐Hydroxycarboxylic Acids by Manganese Catalyzed Acceptorless Dehydrogenative Coupling of Ethylene Glycol and Primary Alcohols**
作者:Satyadeep Waiba、Kakoli Maji、Mamata Maiti、Biplab Maji
DOI:10.1002/anie.202218329
日期:2023.3
A versatile synthesis of highly demanded α-hydroxycarboxylic acids via dehydrogenativecoupling of two feedstock chemicals, ethylene glycol, and primaryalcohols, is reported. An Earth's abundant metal complex catalyzes the reaction with high yields and selectivities. Water and hydrogen gas are produced as the sole byproducts.