sodium azide), from which 5-acetyltropolone is derived in an 80% yield by ozonolysis or in a 40% yield with sulfuric acid. The considerable differences in the reactivities observed between these 4- and 5-substituted tropolones are discussed. The pKa values of 4- and 5-acetyltropolone and 4- and 5-(3,4,5-trimethoxycinnamoyl)tropolones are also reported.
A high-security, low-cost, corrosion proof, insect proof such as ant proof, low in formic aldehyde concentration level and significantly useful adhesive for wood is provided and a woody material such as plywood manufactured by the use of the adhesive is also provided.
Cedarwood oil
4
is mixed into a resin base
3
as a main component of the adhesive
2
so as to constitute the adhesive
2
for wood and the adhesive
2
is used to bond single panels
10
constituting the woody material such as plywood
1.