Khan, Mukhtar Hussain; Haque, Raziul; Safi, Ahmad, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 10, p. 1069 - 1074
Process for developing a direct reversal silver halide photographic
申请人:Fuji Photo Film Co., Ltd.
公开号:US03970459A1
公开(公告)日:1976-07-20
A process for developing a light-sensitive material which comprises processing a direct reversal silver halide photographic light-sensitive material comprising a support having thereon a silver halide photographic emulsion comprising 1. cubic silver halide grains having fogging nuclei therein provided by adding a strong reducing agent to the emulsion and ripening the emulsion, and 2. A. a compound acting as an electron acceptor being capable of receiving photoelectrons and also acting as a development accelerator bearing atoms capable of being positively charged in a developer or B. a compound as an electron acceptor capable of receiving photoelectrons and a compound as a development accelerator bearing atoms capable of being positively charged in a developer in an aqueous solution of a hydrophilic colloid with a developer containing a developing agent bearing atoms capable of being negatively charged in the developer is disclosed.
Khan, Mukhtar Hussain; Haque, Raziul; Safi, Ahmad, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 10, p. 1069 - 1074
Aminocatalyzed asymmetric Diels–Alder reaction of 2,4-dienals and rhodanine/hydantoin derivatives
作者:Kailong Zhu、Huicai Huang、Wenbin Wu、Yuan Wei、Jinxing Ye
DOI:10.1039/c3cc00023k
日期:——
Aminocatalyzed asymmetricDiels-Alderreaction between 2,4-dienals and rhodanine/hydantoin derivatives via trienamine mechanism has been developed to synthesize various spirocyclic compounds with good yields (up to 98%) and excellent stereoselectivities (up to 99% ee and >19 : 1 dr).