A novel method for forming a metal-carbene bond is disclosed.

A novel method for forming a metal-carbene bond is disclosed.

The present invention relates to novel compounds of the formula (I), in which R is is hydrogen or hydroxy, that can be obtained by fermentation of the microorganism strain Corallococcus coralloides ST201330 (DSM 24989).

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The present invention provides contrast agents of the formula [N(A.sub.1,A.sub.2,A.sub.3) M](counter ion(s)) for use in a diagnostic method practiced on the human or animal body. It also refers to the contrast agents, as well as pharmaceutical compositions containing same. Further, it relates to a method of in vitro medical imaging, especially of diagnostic imaging, comprising administering said compound to a sample.

The present invention provides contrast agents of the formula [N(A.sub.1,A.sub.2,A.sub.3) M](counter ion(s)) for use in a diagnostic method practiced on the human or animal body. It also refers to the contrast agents, as well as pharmaceutical compositions containing same. Further, it relates to a method of in vitro medical imaging, especially of diagnostic imaging, comprising administering said compound to a sample.

The application discloses pharmaceutical compounds of formula I useful for treating CNS diseases wherein m, s, R.sup.1 R.sup.5, R.sup.6 and R.sup.7 are as defined herein.

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The application discloses pharmaceutical compounds of formula I useful for treating CNS diseases wherein m, s, R.sup.1 R.sup.5, R.sup.6 and R.sup.7 are as defined herein.

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Provided herein are small molecule active metabotropic glutamate subtype-2 and -3 receptor negative allosteric modulators (NAMs), compositions comprising the compounds, and methods of using the compounds and compositions.

Provided herein are small molecule active metabotropic glutamate subtype-2 and -3 receptor negative allosteric modulators (NAMs), compositions comprising the compounds, and methods of using the compounds and compositions.

The present invention relates to a process for providing the compound of formula I, comprising the step of reacting a compound of formula VII with a base in the presence of an alkaline- or alkaline earth metal salt (MX), wherein LG is a leaving group. The presence of an alkaline- or alkaline earth metal salt was surprisingly found to render said reaction highly reliable in terms of the yield and purity of the compound of formula I obtained. In a further aspect, the present invention relates to the compound of formula I, having less than an amount of 1.50% or less than an amount of 1.25% or less than an amount of 1.00% or less than an amount of 0.75% or less than an amount of 0.50% or less than an amount of 0.25% or less than an amount of 0.10% of the compound of formula VIII. ##STR00001##