Triflic Acid Catalyzed Reductive Coupling Reactions of Carbonyl Compounds with O-, S-, and N-Nucleophiles
作者:Beate A. Gellert、Nils Kahlcke、Markus Feurer、Stefanie Roth
DOI:10.1002/chem.201101819
日期:2011.10.17
Highly efficient metal‐free reductivecoupling reactions of aldehydes and ketones with a range of nucleophiles in the presence of triflic acid (1–5 mol %) as the catalyst are presented. The reactions can be performed at ambient temperature without exclusion of moisture or air. A range of symmetrical and unsymmetrical ethers were obtained by this method in high yields and short reaction times. For the
The present invention relates to 2,3,4,9-tetrahydro-1 H-carbazoles of the general formula I,
in which Q, X, W, R1, R2, R3, R4 and R5 have the meaning as defined in the description.
The compounds according to the invention are effective FSH antagonists and can be used for example for fertility control in men or in women, or for the prevention and/or treatment of osteoporosis.
Reductive Etherification of Aldehydes and Ketones with Alcohols and Triethylsilane Catalysed by Yb(OTf)
<sub>3</sub>
: an Efficient One‐Pot Benzylation of Alcohols
The one‐pot synthesis of symmetrical and unsymmetrical ethers from aldehydes and ketones can be conveniently performed using Yb(OTf)3 as catalyst and triethylsilane as reducing agent in presence of alcohols. This methodology leads to the synthesis of ether derivatives with good yields. Notably, this process resulted a useful tool to protect alcohols as benzyl ether derivatives using differently substituted
The present invention relates to arylmethylene substituted N-Acyl-β-amino alcohols of the formula I
in which
Y
is selected from the aryl or heteroaryl groups:
and
R1, R2, R3, R4, R5, Q, X and W have the meaning as defined in the description.
The compounds according to the invention are effective FSH antagonists and can be used for example for fertility control in men or in women, or for the prevention and/or treatment of osteoporosis.
本发明涉及式I的芳基亚甲基取代的N-酰基-β-氨基醇
其中
Y
从芳基或杂芳基中选择:
和
R1、R2、R3、R4、R5、Q、X和W的含义如描述中所定义。
根据本发明的化合物是有效的FSH拮抗剂,例如可用于男性或女性的生育控制,或用于骨质疏松症的预防和/或治疗。
Cyanomethyl substituted N-Acyl Tryptamines
申请人:Bayer Schering Pharma Aktiengesellschaft
公开号:EP2020404A1
公开(公告)日:2009-02-04
The present invention relates to cyanomethyl substituted N-acyl tryptamines of the formula I
in which
R1, R2, R3, R4, R5, Q, X and W have the meaning as defined in the description.
The compounds according to the invention are effective FSH antagonists and can be used for example for fertility control in men or in women, or for the prevention and/or treatment of osteoporosis.