The present invention provides (6Z,9Z)-6,9-dodecadien-1-yne of the following formula (1). Further, the present invention provides a process for preparing (6Z,9Z)-6,9-dodecadien-1-yne (1): the process comprising reacting a (3Z,6Z)-10-halo-3,6-decadiene compound of the following general formula (2), wherein X represents a halogen atom with a metal acetylide of the following general formula (3), wherein M represents Na, Li, K, Ag, Cu (I), MgZ, CaZ, or Cu(II)Z, wherein Z represents a halogen atom or an ethinyl group to form (6Z,9Z)-6,9-dodecadien-1-yne (1). ##STR00001##

The present invention provides (6Z,9Z)-6,9-dodecadien-1-yne of the following formula (1). Further, the present invention provides a process for preparing (6Z,9Z)-6,9-dodecadien-1-yne (1): the process comprising reacting a (3Z,6Z)-10-halo-3,6-decadiene compound of the following general formula (2), wherein X represents a halogen atom with a metal acetylide of the following general formula (3), wherein M represents Na, Li, K, Ag, Cu (I), MgZ, CaZ, or Cu(II)Z, wherein Z represents a halogen atom or an ethinyl group to form (6Z,9Z)-6,9-dodecadien-1-yne (1). ##STR00001##

The present invention is generally related to a novel catalytic composition and a method for the production of 1,4 -butynediol by catalytic ethynylation of formaldehyde, the said method is known as the Reppe reaction. The invented catalyst with lower copper content would provide an advantageous combination of improved utilization efficiency of copper, reduced copper leaching and enhanced filterability, and has minimal to no impact on catalytic activity.

The present invention is generally related to a novel catalytic composition and a method for the production of 1,4 -butynediol by catalytic ethynylation of formaldehyde, the said method is known as the Reppe reaction. The invented catalyst with lower copper content would provide an advantageous combination of improved utilization efficiency of copper, reduced copper leaching and enhanced filterability, and has minimal to no impact on catalytic activity.

The present invention is generally related to a novel catalytic composition and a method for the production of 1,4 -butynediol by catalytic ethynylation of formaldehyde, the said method is known as the Reppe reaction. The invented catalyst with lower copper content would provide an advantageous combination of improved utilization efficiency of copper, reduced copper leaching and enhanced filterability, and has minimal to no impact on catalytic activity.

The present invention relates to a catalytic process for the ethynylation of specific polyunsaturated aldehydes and ketones.

The present invention relates to a catalytic process for the ethynylation of specific polyunsaturated aldehydes and ketones.

The present invention relates to a catalytic process for the ethynylation of specific polyunsaturated aldehydes and ketones.

The present invention relates to the catalytic ethynlation of αβ-unsaturated ketones for producing tertiary acetylenic alcohols.

The present invention relates to the catalytic ethynlation of αβ-unsaturated ketones for producing tertiary acetylenic alcohols.