Cryptophycins are naturallyoccurring cytotoxins with great potential for chemotherapy. Since targeted therapy provides new perspectives for treatment of cancer, new potent analogues of cytotoxic agents containing functional groups for conjugation to homing devices are required. We describe the design, synthesis and biological evaluation of three new unit B cryptophycin analogues. The O-methyl group of the unit
Synthesis of Oxacyclic Scaffolds via Dual Ruthenium Hydride/Brønsted Acid-Catalyzed Isomerization/Cyclization of Allylic Ethers
作者:Erhad Ascic、Ragnhild G. Ohm、Rico Petersen、Mette R. Hansen、Casper L. Hansen、Daniel Madsen、David Tanner、Thomas E. Nielsen
DOI:10.1002/chem.201304270
日期:2014.3.17
A ruthenium hydride/Brønsted acid‐catalyzed tandem sequence is reported for the synthesis of 1,3,4,9‐tetrahydropyrano[3,4‐b]indoles (THPIs) and related oxacyclic scaffolds. The process was designed on the premise that readily available allylic ethers would undergo sequential isomerization, first to enol ethers (Ru catalysis), then to oxocarbenium ions (Brønsted acid catalysis) amenable to endo cyclization
据报道,氢化钌/布朗斯台德酸催化的串联序列可用于合成1,3,4,9-四氢吡喃[3,4- b ]吲哚(THPIs)和相关的氧环骨架。该过程被设计的前提是容易得到的烯丙基醚将经历连续的异构化,第一至烯醇醚(RU催化),然后到oxocarbenium离子(布朗斯台德酸催化)适合于内 环化栓系亲核体。该方法不仅为合成THPI的传统oxa-PIctet-Spengler反应提供了有吸引力的替代方法,而且还方便地获得THPI同类物和其他重要的乙环(如乙缩醛)。
Dealkenylative Ni-Catalyzed Cross-Coupling Enabled by Tetrazine and Photoexcitation
A new and general method to functionalize the C(sp3)–C(sp2) bond of alkyl and alkene linkages has been developed, leading to the dealkenylative generation of carbon-centered radicals that can be intercepted to undergo Ni-catalyzed C(sp3)–C(sp2) cross-coupling. This one-pot protocol leverages the easily procured alkene feedstocks for organic synthesis with excellent functional group compatibility without
A compound represented by the general formula:
or a pharmaceutically acceptable salt thereof or a solvate thereof, wherein Ring A is a C
6-14
aryl group or the like, L is —NR
e
CO— or the like (wherein R
e
is a hydrogen atom or the like), Ring B is a C
6-14
aryl group or the like, X is a C
1-3
alkylene group or the like, Y is a single bond or the like, Z is a C
1-3
alkylene group or the like, R
1
and R
2
are each independently a hydrogen atom or the like, and R
3
, R
4
, R
5
and R
6
are independently a hydrogen atom, a halogen atom or the like, has an Aβ production inhibitory effect or a BACE1 inhibitory effect and is useful as a prophylactic or therapeutic agent for a neurodegenerative disease caused by Aβ and typified by Alzheimer-type dementia.
[EN] COMPOUNDS AND METHODS FOR THE TARGETED DEGRADATION OF ANDROGEN RECEPTOR<br/>[FR] COMPOSÉS ET MÉTHODES POUR LA DÉGRADATION CIBLÉE DU RÉCEPTEUR DES ANDROGÈNES
申请人:ARVINAS OPERATIONS INC
公开号:WO2021127443A1
公开(公告)日:2021-06-24
This disclosure pertains to compounds, the preparation thereof, and the use of these compounds in the treatment of prostate cancer, including metastatic and/or castrate-resistant prostate cancer, in subjects in need thereof.