Benzynes were generated from o-(trimethylsilyl)phenols using nonafluorobutanesulfonyl fluoride (NfF) by a domino process, i.e., the nonaflation of the phenolic hydroxyl group of o-(trimethylsilyl)phenols by NfF followed by the attack of the produced fluoride ion on the trimethylsilyl group. The generated benzyne immediately underwent various reactions to give polysubstituted benzenes.
Enantioselective Spirocyclopropanation of <i>para</i>-Quinone Methides Using Ammonium Ylides
作者:Lukas Roiser、Mario Waser
DOI:10.1021/acs.orglett.7b00869
日期:2017.5.5
The use of Cinchonaalkaloid-based chiral ammonium ylides allows for the first highlyenantioselective and broadly applicable spirocyclopropanation reactions of para-quinone methides. This strategy provides a straightforward protocol toward the chiral spiro[2.5]octa-4,7-dien-6-one skeleton, which is a frequently found structural motif in important biologically active molecules.
Synthesis of spiro[2.5]octa-4,7-dien-6-one with consecutive quaternary centers <i>via</i> 1,6-conjugate addition induced dearomatization of <i>para</i>-quinone methides
作者:Kuo Gai、Xinxin Fang、Xuanyi Li、Jinyi Xu、Xiaoming Wu、Aijun Lin、Hequan Yao
DOI:10.1039/c5cc06287j
日期:——
An efficient one-pot approach for the synthesis of spiro[2.5]octa-4,7-dien-6-ones by employing para-quinone methides has been developed. The reaction proceeded smoothly in high yields under mild conditions without the use of...
Disclosed are bifunctional targeted protein autophagy degraders that comprise: 1) a small-molecule targeting a protein of interest; 2) a linker; and 3) a small-molecule recruiter of the autophagy adapter LC3B. These degraders target specific proteins for degradation through the autophagy-lysosomal degradation pathway.