摘要:
Disclosed is a method for total synthesis of CTX1B, which is developed for the synthesis of a ciguatoxin analogue such as CTX3C and enables the more efficient application of an established reaction to the total synthesis of CTC1B. More specifically, disclosed is a method for total synthesis of CTX1B comprising; an 0.5-acetal formation for synthesizing a novel compound (3); a radical cyclization reaction for constructing a 9-membered ring formation reaction including a novel compound (6) through a novel compound (8) and yielding a compound (D); and a deprotection for yielding CTX1B. Also disclosed are novel compounds (1) to (8) which are particularly useful for synthesis of CTX1B and can be used for the synthesis of a ciguatoxin analogue.
摘要:
A novel method for synthesis of a novel NAP-protected ciguatoxin class precursor represented by following compound 8, and an intermediate useful in the novel method synthesizing the precursor, and a novel method of total synthesis of CTX3C class via the compound 8.
摘要:
Disclosed is a method for total synthesis of CTX1B, which is developed for the synthesis of a ciguatoxin analogue such as CTX3C and enables the more efficient application of an established reaction to the total synthesis of CTC1B. More specifically, disclosed is a method for total synthesis of CTX1B comprising; an O.S-acetal formation for synthesizing a novel compound (3); a radical cyclization reaction for constructing a 9-membered ring formation reaction including a novel compound (6) through a novel compound (8) and yielding a compound (D); and a deprotection for yielding CTX1B. Also disclosed are novel compounds (1) to (8) which are particularly useful for synthesis of CTX1B and can be used for the synthesis of a ciguatoxin analogue.
摘要:
A CO2 sensor includes: a sensing portion operable to change in color in accordance with a CO2 partial pressure in expiration from at least one of nares and a mouth of a living body; and a mounting member adapted to hold the sensing portion at a position where the expiration from the at least one of the nares and the mouth impinges on the sensing portion.
摘要:
An airway adaptor that measures the concentration of at least one of a specific component and the flow rate of a supply gas and a return gas. The airway adapter may include a tube having a flow path in which the supply gas and the return gas passes. The tube may include a first end having a first aperture for guiding the supply gas into the flow path, and second end having a second aperture for guiding the return gas. Further, the airway adapter may include a measurement device operable to measure at least one of the supply gas and the return gas in the air flow path and a partial shielding disposed at the first aperture and structured to shield a portion of the air flow path. The supply gas may be a respiratory gas and the return gas may be inhaled or exhaled breath of a person.
摘要:
Disclosed is an electronic information terminal device, which makes it possible to establish an area having an arbitral shape only by performing a simple action on a multi-touchable panel provided therewith. The device includes: a display section that is provided with a touch panel, which is capable of detecting two or more touched positions simultaneously; and an area setting control section that establishes an area based on a moving locus of a line segment connecting a plurality of touched positions, when at least one of the plurality of touched positions has moved, so as to make the display section display an image in which information residing within the area, above-established, is erased, or in which another information is added into the area above-established. The device is provided with an erasing operation mode for erasing a figure and a depicting operation mode for depicting another figure in a selectable manner.
摘要:
Provided is a proofreading device capable of accepting proofreader's marks, which includes: a user attribute identification section configured to identify an attribute of a user; a storage section configured to store proofreader's mark sets and attributes of users in association with each other and to store intermediate mark set to be used to place the proofreader's marks having the same meaning among the proofreader's sets in correspondence to each other; a proofreader's-mark-set selection section configured to a proofreader's mark set corresponding to the attribute of the user; a proofreader's mark conversion section configured to convert the proofreader's marks, added to a document by a first proofreader, into intermediate marks, to convert the intermediate marks into the proofreader's marks of the proofreader's mark set selected on the basis of the attribute of a second user, and to cause a display section to display the converted proofreader's marks together with the document.
摘要:
According to one embodiment, an information processor, which is capable of supplying power to an external device, includes a connector, a storage module, and a power supply control module. The connector connects the external device to the information processor. The storage module stores a plurality of power supply modes each defining conditions of respective modules of the information processor to make the external device connected to the connector chargeable. The power supply control module selects a power supply mode effective for the external device from the power supply modes when the external device is connected to the connector, and sets the respective modules of the information processor according to the conditions corresponding to the power supply mode selected.
摘要:
According to a metal joining method of the present invention, first and second dissimilar metals are joined together by interposing between the first and second metal materials a third metal material dissimilar to the first and second metal materials and causing eutectic melting at least either at an interface between the first and third metal materials or at an interface between the second and third metal materials.
摘要:
In an optical disk apparatus, by obtaining the temperature in the vicinity of a laser in the apparatus, the power source voltage of the laser driver is controlled such that power consumed by the headroom of the laser driver is reduced to the maximum extent without deteriorating the current drive characteristic of the headroom when the temperature becomes higher. The laser driving current of the laser driver is monitored to control the power source of the laser driver such that the power consumed by the headroom is possibly reduced while maintaining the current drive characteristic of the headroom for the monitored current.