5689-37-2Relevant academic research and scientific papers
One step synthesis of 2-alkenylchromanes via inverse electron-demand Hetero-Diels–Alder reaction of o-quinone methide with unactivated dienes
Liu, Jian,Wang, Xiaoxiao,Xu, Lubin,Hao, Zhihui,Wang, Liang,Xiao, Jian
supporting information, p. 7642 - 7649 (2016/11/11)
The synthetically important 2-alkenylchromane derivatives were constructed in good yields under metal-free condition via inverse electron demand Hetero-Diels–Alder reaction of o-quinone methides with unactivated dienes. This strategy features mild conditi
Tosylhydrazine mediated conjugate reduction and sequential reductive coupling cyclization: Synthesis of 2-arylchromans
Shang, Xuyang,Zhou, Xiaomeng,Zhang, Wei,Wan, Changfeng,Chen, Junmin
supporting information, p. 8187 - 8193 (2015/12/30)
Tosylhydrazine mediated conjugate reduction of 2-hydroxyl chalcones and sequential reductive coupling cyclization is described. This is an unprecedented protocol and an extremely efficient method for a one-pot domino synthesis of 2-arylchromans in good to excellent yields from commercially available, cheap starting materials. More importantly, the two-step reactions can be easily controlled to afford dihydrochalcones or 2-arylchromans by the mole amounts of tosylhydrazine. Furthermore, the operational simplicity of the process and the high functional group tolerance are remarkable.
Synthesis of chromans via [3 + 3] cyclocoupling of phenols with allylic alcohols using a Mo/o-chloranil catalyst system
Yamamoto, Yoshihiko,Itonaga, Kouhei
supporting information; experimental part, p. 717 - 720 (2009/08/19)
(Chemical Equation Presented) The combination of a molybdenum complex (CpMoCl(CO)3 or [CpMo(CO)3]2) and o-chloranil was used as a catalyst in the [3 + 3] cyclocoupling of phenols and allylic alcohols under microwave heating conditions. Substituted chromans were selectively obtained in moderate to good isolated yields.
Intramolecular excited-state interactions in phenol-styrene bicromophoric systems: A photochemical and photophysical study
Consuelo Jiménez,Miranda, Miguel A,Tormos, Rosa
, p. 115 - 120 (2007/10/03)
The intramolecular excited state interaction between phenol and styrene in a series of trans-2-cinnamylphenols bearing electron-donating substituents at the phenolic ring has been directly observed as an exciplex emission in acetonitrile. The photochemica
An improved method for synthesis of 1-benzopyrans from unsaturated alcohols and phenols using a catalytic amount of acids
Ishino,Mihara,Hayakawa,Miyata,Kaneko,Miyata
, p. 439 - 448 (2007/10/03)
1-Benzopyrans, such as chromans and chromenes, were prepared in good to excellent yields by using a catalytic amount of p-toluenesulfonic acid through intermolecular cyclization reaction of phenols with unsaturated alcohols in 1,2-dichlroroethane.
STEREOSELECTIVITY AT BENZYLIC CARBON. FLAVANOIDS-V. SYNTHESIS OF TRANS-4-ACETAMIDOFLAVANS
Hirwe, A.,Marathe, K. G.,Mohorkar, S. S.,Ramdas, K.,Singh, C. B.
, p. 1539 - 1546 (2007/10/02)
Some reactions of 4-substituted flavans have been studied. 4-Chloro/bromo derivatives react under neutral conditions with phthalimide and acetonitrile leading to displacement of axial halogen by nitrogen with inversion.In contrast, irrespective of the ste
