Intermediate view synthesis from stereoscopic images

A new method is proposed for synthesizing intermediate views from a pair of stereoscopic images. In order to synthesize high-quality intermediate views, the block matching method together with a simplified multi-window technique and dynamic programming is used in the process of disparity estimation. Then occlusion detection is performed to locate occluded regions and their disparities are compensated. After the projecton of the left-to-right and right-to-left disparities onto the intermediate image, intermediate view is synthesized considering occluded regions. Experimental results show that our synthesis method can obtain intermediate views with higher quality.

Chiral Synthesis of the Intermediate of (-)-Gibberellin A_(12)

(-)-Dimethyl(1R,4aS),4a-dimethyl-6-nitro-1,2, 3,4, 4a-pentahydrofluorene-1, 9 -dicarboxylate (1) was synthesized from (R)-(+)-2 -methyl- 2 -(2 -nitrovinyl)-δ-valerolactone(2),which constitutes a formal total Synthesis of (-)-gibberellin A_(12).

STUDY ON THE SYNTHESIS OF TETRACYCLIC DITERPENOID 7 Preparation of the Key Intermediate 5 for the Synthesis of Grandiflorenic Acid and its Analogues

The key intermediate 5 for synthesis of the contragestationally active diterpenoid grandiflorenic acid(1)and its analogues 2 and 3 was prepared and an acetyl transposition reaction occurred in the SeO_2 oxida- tion of 8.

STUDIES ON THE SYNTHESIS OF CEMBRANOLIDESⅠ.THE SYNTHESIS OF A KEY INTERMEDIATE(E,E,E,E)-2,6,10,14-TETRAMETHYL-8-BENZENESULFONYL-2,6,10,14-TETRAEN-1,16-HEXADECADIOL

A key intermediate of cembranolides--(E,E,E,E)- 2,6,10,14- tetramethyl- 8-benzenesulfonyl- 2,6,10,14- tetraen-1,16- hexadecadiol was synthesized from geraniol and linalool through six steps.

SYNTHESIS OF A POTENTIAL ANTIFEEDANT SESOUITERPENE INTERMEDIATE FROM A NEW TERPENOID A, B-RING SYNTHON BY TANDEM NICHAEL REACTION

An efficient synthesis of functionalized 6-decalone 16, starting from a dienolate anion 3a via a tandem Michael reaction, is described. 16 could be used as a potential intermediate for synthesis of drimane related sesquiterpenes.

Application of carbene reactive intermediates in organic synthesis——Ⅲ.Reaction of difluorocarbene with trimethylsilyl enol ethers

The addition of difluorocarbene generated from phenyl(trifluoromethyl)mercury and anhydrous sodium iodide,with trimethylsilyl enol ethers derived from cyclohexanone,cycloheptanone, 3-pentanone and acetophenone was described.The corresponding 2,2-difluoro-1-trimethylsilyloxy- cyclopropanes were obtained in good yields.The thermal stability of these cyclopropyl derivatives was affected by the molecular strain and the nature of their substituents.Thus,1-trimethylsilyloxy- cyclopentene reacted with difluorocarbene to give only 2-fluoro-2-cyclohexen-1-one instead of the expected 1-trimethylsilyloxy-6,6-difluorobicyclo[3.1.0]hexane,and a mechanism for its formation was proposed.

An efficient chlorination of aromatic compounds using a catalytic amount of iodobenzene

An efficient method was developed for chlorination of aromatic compounds with electron-donating groups using iodobenzene as the catalyst and m-chloroperbenzoic acid as the terminal oxidant in the presence of 4-methylbenzenesulfonic acid in THF at room temperature for 24 h,and a series of the monochlorinated compounds was obtained in good yields.In this protocol,the catalyst iodobenzene was first oxidized into the hypervalent iodine intermediate,which then treated with lithium chloride and finally reacted with aromatic compounds to form the chlorinated compounds.