New anti-tumor agents.<b>2</b>. Benzopyranylamine compounds
作者:Leonard Jurd
DOI:10.1002/jhet.5570330660
日期:1996.11
condense with a variety of amine, aniline and hydrazine derivatives to form diverse isomeric benzopyrans of types of 9 and 10. The benzopyrans 4–9 which contain a 3,4,5-trimethoxyphenyl ring are active anti-tumor agents, particularly against human breast, CNS and colon cancer cell lines, total growth inhibition of these tumors often occurring in vitro at concentrations as low as 10−5-10−6 moles/1. Because
Mannich base derivatives of bioactive benzyl-1,3-benzodioxo-5-ols
作者:Leonard Jurd
DOI:10.1002/jhet.5570220412
日期:1985.7
4-Methylenedioxyphenol (sesamol) reacts with equimolecular quantities of an aromatic aldehyde and morpholine or piperidine in methanol to give Mannich bases 7 and 8, related to insect growth regulators and anti-leukemic and antimitotic benzyl-1,3-benzodioxole derivatives.
Carbene and Acid Cooperative Catalytic Reactions of Aldehydes and <i>o</i>-Hydroxybenzhydryl Amines for Highly Enantioselective Access to Dihydrocoumarins
作者:Xingkuan Chen、Runjiang Song、Yingguo Liu、Chong Yih Ooi、Zhichao Jin、Tingshun Zhu、Hongling Wang、Lin Hao、Yonggui Robin Chi
DOI:10.1021/acs.orglett.7b02883
日期:2017.11.3
A highly enantioselective method for quick access to dihydrocoumarins is reported. The reaction involves a cooperative catalytic process with carbene and in situ generated Brønsted acid as the catalysts. α-Chloro aldehyde and readily available and stable o-hydroxybenzhydryl amine substrates were used to generate reactive azolium ester enolate and ortho-quinone methide (o-QM) intermediates, respectively