研究表明，H3BO3与杉木粉中的羟基发生了缩合反应，纤维素的结晶被破坏；
The results showed that hydroxyl groups of H3BO3 reacted with the hydroxyl groups of fir powder, and thus the crystalline phase of cellulose was destroyed.
缩合物的酸催化水合后的水解反应在保护剂存在下进行，羟基香茅醛的产率达87.7%。
After acid catalytic dehydration the condensate subsequent hydrolysis was proceeded in the existence of protective agent, the yield of hydroxycitronellal came up to 87.7%.
其原因为随着温度的升高，附着水排出和羟基结构的缩合。
This was attributed to the loss of water of hydration as well as the condensation of structural hydroxyl groups with increasing temperature.
研究了在稀碱催化下邻羟基苯乙酮和苯甲醛在乙醇溶液中的羟醛缩合反应，溶剂可以循环使用，适合工业化生产。
During the condensation reaction, the feedstock remaining after reaction can be recycled, and this synthesis route was suitable for the commercial production.
报道了一类1，1-二取代炔丙醇（1）氯代产物与4-甲基-7-羟基香豆素反应的异常缩合产物。
This paper reported a kind of unusual products from the reaction of chlorides of 1,1-disubstitutedpropargyl alcohols with 4-methyl-7-hydroxycoumarin.
研究了2 -氨基- 2' -羟基- 1,1 ' -联萘衍生的有机小分子催化剂催化的直接羟醛缩合反应。
The direct aldol reactions catalyzed by organocatalyst derived from 2-amino-2 '-hydroxy-1, 1' -binaphthyl were studied.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
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