Synthesis of oxygen-substituted benzocycloheptenes as valuable intermediate products for the production of tissue-selective estrogens
申请人:Schering AG
公开号:US20030162974A1
公开(公告)日:2003-08-28
The invention relates to intermediate products and a new process for the production of benzocycloheptene C.
1
The process for the production of its new intermediate products according to the invention starts from economical starting materials, provides the intermediate stages in high yields and high purity, without chromatographic purification steps, and allows production on an industrial scale.
The present invention relates to processes for the production of sterically hindered diol ethers and diacyl ethers of formula
本发明涉及用于生产式的立体障碍二元醚和二酰基醚的过程。
Acid-labile polymers and monomers for their construction
申请人:Brainard Robert L.
公开号:US08895691B2
公开(公告)日:2014-11-25
Polymers for photoresists and monomers for incorporation into those polymers are disclosed. The polymers comprise at least two components: an acid labile component and a photolytically stable and acid-stable component. The polymers may also contain a third, photoacid generator (PAG) component. The acid-labile component is based on the presence of a readily cleavable oxygen-carbon bond that usually occurs in a sterically hindered ether or ester.