Disclosed are a class of compounds as a caspase inhibitor, and in particular the compound as shown in formula (I) or a pharmaceutically acceptable salt thereof, and the use of the compound in treating caspase-related diseases.

##STR00001##

Disclosed are a class of compounds as a caspase inhibitor, and in particular the compound as shown in formula (I) or a pharmaceutically acceptable salt thereof, and the use of the compound in treating caspase-related diseases.

##STR00001##

It is an object of the present invention to provide an excellent method for producing an excellent therapeutic agent. The solution of the present invention is as shown in the following scheme: ##STR00001##
wherein R.sup.1 represents a C1-C6 alkyl group, R.sup.2 represents a C1-C6 alkyl group, and R.sup.3 represents a C1-C6 alkyl group.

It is an object of the present invention to provide an excellent method for producing an excellent therapeutic agent. The solution of the present invention is as shown in the following scheme: ##STR00001##
wherein R.sup.1 represents a C1-C6 alkyl group, R.sup.2 represents a C1-C6 alkyl group, and R.sup.3 represents a C1-C6 alkyl group.

It is an object of the present invention to provide an excellent method for producing an excellent therapeutic agent.

The solution of the present invention is as shown in the following scheme:

##STR00001## wherein R.sup.1 represents a C1-C6 alkyl group, R.sup.2 represents a C1-C6 alkyl group, and R.sup.3 represents a C1-C6 alkyl group.

Processes for removing carbon disulfide from product streams containing a sulfide compound are performed by contacting the product stream with an alkanolamine and converting the carbon disulfide to a higher boiling point product, thereby reducing or eliminating carbon disulfide from the product stream. Subsequent removal of the higher boiling point product via distillation can lead to a purified sulfide stream with high purity.

In one aspect, the disclosure relates to methods for preparation of intermediates useful for the preparation of terpenoid cores. In a further aspect, the disclosed methods pertain to the preparation of compounds comprising a terpenoid core or scaffold, such as 6/7/5 tricycloalkanes. The disclosed methods utilize abundant starting materials and simple reaction sequences that can be used to tunably and scalably assemble common terpenoid cores. In various aspects, the present disclosure pertains to compounds prepared using the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

In one aspect, the disclosure relates to methods for preparation of intermediates useful for the preparation of terpenoid cores. In a further aspect, the disclosed methods pertain to the preparation of compounds comprising a terpenoid core or scaffold, such as 6/7/5 tricycloalkanes. The disclosed methods utilize abundant starting materials and simple reaction sequences that can be used to tunably and scalably assemble common terpenoid cores. In various aspects, the present disclosure pertains to compounds prepared using the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

In one aspect, the disclosure relates to methods for preparation of intermediates useful for the preparation of terpenoid cores. In a further aspect, the disclosed methods pertain to the preparation of compounds comprising a terpenoid core or scaffold, such as 6/7/5 tricycloalkanes. The disclosed methods utilize abundant starting materials and simple reaction sequences that can be used to tunably and scalably assemble common terpenoid cores. In various aspects, the present disclosure pertains to compounds prepared using the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

In one aspect, the disclosure relates to methods for preparation of intermediates useful for the preparation of terpenoid cores. In a further aspect, the disclosed methods pertain to the preparation of compounds comprising a terpenoid core or scaffold, such as 6/7/5 tricycloalkanes. The disclosed methods utilize abundant starting materials and simple reaction sequences that can be used to tunably and scalably assemble common terpenoid cores. In various aspects, the present disclosure pertains to compounds prepared using the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.